Quadratic Functions Vocabulary Gameshow quiz. by Myluna · Illustrations of Quadratic Equations Quiz. by Delacruz. G9 Math.Section 5: Graph of a General Quadratic 16 5. Graph of a General Quadratic The final section is about sketching general quadratic functions, i.e. ones of the form y = ax2 +bx+c. The algebraic expression must be rearranged so that the line of sym-metry and the orthogonal axis may be determined. The procedure required is completing the square.Get ready for questions on the unit so far. 6 questions 6 - 12 minutes. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere. Quadratic Functions Test quiz for 9th grade students. Find other quizzes for Mathematics and more on Quizizz for free! ... Use the graph to determine the zeros.-1 and -3. 1 and -3. 1 and 3-1 and 3. Multiple Choice. Edit. Please save your changes before editing any questions. 30 seconds.This test covers the following: -understanding what a solution means -knowing what an imaginary number is -solving by factoring (a=1 and a>1) -graphing quadratics-finding the discriminant & stating how many solutions -using the quadratic formula -giving a possible equation of a quadratic using a graph -identifying key features of a ...Unit 1 Properties of functions. Unit 2 Linear equations, inequalities, and systems. Unit 3 Quadratic functions & equations introduction. Unit 4 More on quadratics & complex numbers. Unit 5 Polynomial equations & functions introduction. Unit 6 More on polynomial equations & functions. Unit 7 Inverse functions. Unit 8 Radical functions & equations.The graph of the quadratic function is in the form of a parabola. The quadratic formula is used to solve a quadratic equation ax 2 + bx + c = 0 and is given by x = [ -b ± √(b 2 - 4ac) ] / 2a. The discriminant of a quadratic equation ax 2 + bx + c = 0 is given by b 2-4ac. This is used to determine the nature of the zeroes of a quadratic function.MHR • Pre-Calculus 11 Solutions Chapter 4 Page 4 of 95 f) Solve 0 = t2 + 4t + 10 by graphing the corresponding function y = t2 + 4t + 10. Since there are no x-intercepts, there are no real roots of the equation. Section 4.1 Page 215 Question 4 a) Solve n2 – 10 = 0 by graphing the corresponding function y = n2 – 10. The roots of the equation are –3.2 and …quadratic function. a function that can be written as y=ax^2+bx+c, where 'a' is not zero. parabola. the u-shaped graph of a quadratic function. select all of the following that are quadratic equations. 3x^2+5x-7=0. 5x^2+15x=0. x^2-4x=4x+7. what is the value of 'c' in the quadratic equation 3x^2+5x+7=0? Multiple Choice. 3 minutes. 1 pt. What piece of information does c identify in the following equation? y=ax 2 +bx+ c. Zeroes. Axis of Symmetry. Vertex. Y-intercept.Step 1: Enter the equation you want to solve using the quadratic formula. The Quadratic Formula Calculator finds solutions to quadratic equations with real coefficients. For equations with real solutions, you can use the graphing tool to visualize the solutions. Quadratic Formula: x = −b±√b2 −4ac 2a x = − b ± b 2 − 4 a c 2 a.Create quadratic equations in two or more variables to represent relationships between quantities; graph equations on coordinate axes with labels and scales. (The phrase in two or more variables refers to formulas like the compound interest formula, in which A = P(1 + r/n)nt has multiple variables.) MGSE9–12.A.CED.4Figure 9.5.29. The formula D = rt D = r t assumes we know r r and t t and use them to find D D. If we know D D and r r and need to find t t, we would solve the equation for t t and get the formula t = D r t = D r. Some uniform motion problems are also modeled by quadratic equations. Example 9.5.6 9.5. 6.1 pt. Define Roots, Zeros, X-intercept, and Solutions. Where the parabola touches or interests the x-axis. Where the parabola touches or interests the y-axis. Multiple Choice. 2 minutes. 1 pt. 7 What is the a-value: y = 2x2 + 5x + 2 1 2 8 What type of polynomial is always prime? A binomial sum of squares A trinomial 9 What method would you use to solve the equation: y = (x + 3) (2x + 1) Zero Product Property Complete the Square 10 What method would you use to solve the equation: y = 4x2 + 10 Square Roots Method Quadratic Formula 11Let’s start with. x2 +bx x 2 + b x. and notice that the x2 has a coefficient of one. That is required in order to do this. Now, to this lets add (b 2)2 ( b 2) 2. Doing this gives the following factorable quadratic equation. x2+bx +( b 2)2 = (x + b 2)2 x 2 + b x + ( b 2) 2 = ( x + b 2) 2. This process is called completing the square and if we ...Get ready for questions on the unit so far. 6 questions 6 - 12 minutes. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Topic A: Lessons 1-3: Piecewise, quadratic, and exponential functions: Module 1: Relationships between quantities and reasoning with equations and their graphs Topic A: Lessons 4-5: Analyzing graphs: Module 1: Relationships between quantities and reasoning with equations and their graphs Topic B: Lesson 8: Adding and subtracting polynomials: Module 1: Relationships between quantities and ...We call this graphing quadratic functions using transformations. In the first example, we will graph the quadratic function f(x) = x2 by plotting points. Then we will see what effect adding a constant, k, to the equation will have on the graph of the new function f(x) = x2 + k. Example 5.6.1.Section 5: Graph of a General Quadratic 16 5. Graph of a General Quadratic The final section is about sketching general quadratic functions, i.e. ones of the form y = ax2 +bx+c. The algebraic expression must be rearranged so that the line of sym-metry and the orthogonal axis may be determined. The procedure required is completing the square.Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.In math, we define a quadratic equation as an equation of degree 2, meaning that the highest exponent of this function is 2. The standard form of a quadratic is y = ax ^2 + bx + c, where a, b, and ...Study Guides. Algebra I. Quiz: Solving Quadratic Equations. Preliminaries and Basic Operations. Preliminaries. Quiz: Preliminaries. Properties of Basic Mathematical Operations. Quiz: Properties of Basic Mathematical Operations. Multiplying and Dividing Using Zero.8-1. Worksheet – Graphing Quadratic Equations Key. 2. Monday 1/29. Midterm Corrections. Commonly Missed Questions Worksheet. 3. Tuesday 1/30. Review FactoringStandard form & Solving Quadratic Equations by Factoring.In order to graph a quadratic equation in standard form, the first two steps are to use the equation _____ to find the axis of symmetry, and then you can plug that value back into the equation to find the _____. Chapter Outline. 1.1 Use the Language of Algebra. 1.2 Integers. 1.3 Fractions. 1.4 Decimals. 1.5 Properties of Real Numbers. For years, doctors and engineers have worked to make artificial limbs, such as this hand for people who need them. This particular product is different, however, because it was developed using a 3D printer.Chapter 8 Review Sheet. Algebra 1 Worksheets Quadratic Functions Quadratics Solving Equations. Quadratic Functions. Worksheet Practice Packet. 5 Adding And Subtracting Polynomial Worksheets Quadratics Polyno Polynomials Pre Algebra. The Discriminant Worksheets. Solving Quadratic Equations By The Formula Sas.Draw the graph of the quadratic equation 𝒚 = 𝒙² for values of 𝒙 from -3 to 3. This is shown by the inequality -3 ≤ 𝒙 ≤ 3. 1 of 10. Set up a table of values using the given values ...Exercise 69. Exercise 70a. Exercise 70b. Exercise 70c. Find step-by-step solutions and answers to Glencoe Algebra 2 - 9780079039903, as well as thousands of textbooks so you can move forward with confidence. Step 1: Enter the equation you want to solve using the quadratic formula. The Quadratic Formula Calculator finds solutions to quadratic equations with real coefficients. For equations with real solutions, you can use the graphing tool to visualize the solutions. Quadratic Formula: x = −b±√b2 −4ac 2a x = − b ± b 2 − 4 a c 2 a.y = a ( x − h) 2 + k. This form reveals the vertex, ( h, k) , which in our case is ( − 5, 4) . It also reveals whether the parabola opens up or down. Since a = − 2 , the parabola opens …30 May 2023 ... Q: Math 151 Quiz Quadratic Equations Chapter 8 1. Graph F(X) = X2 - 4x - 5 A.) Find The Vertex 9 8 7 6 5 B.) ...1) You can create a table of values: pick a value of "x" and calculate "y" to get points and graph the parabola. 2) If the quadratic is factorable, you can use the techniques shown in this video. 3) If the quadratic is not factorable, you can use the quadratic formula or complete the square to find the roots of the quadratic (the x-intercepts ...quadratic function. a function that can be written as y=ax^2+bx+c, where 'a' is not zero. parabola. the u-shaped graph of a quadratic function. select all of the following that are quadratic equations. 3x^2+5x-7=0. 5x^2+15x=0. x^2-4x=4x+7. what is the value of 'c' in the quadratic equation 3x^2+5x+7=0?Try this amazing 9-3 And 9-4: Solving Quadratic Equations By Graphing And By Factoring quiz which has been attempted 668 times by avid quiz takers. Also explore over 816 similar quizzes in this category.Study with Quizlet and memorize flashcards containing terms like What is the y-intercept of f(x) = -3x2 - 6x + 4?, What are the coordinates of the vertex of f(x) = -x2 + 6x - 9?, What is the equation of the axis of symmetry for the graph of f(x) = 2x2 + x - 3? and more.Try this amazing 9-3 And 9-4: Solving Quadratic Equations By Graphing And By Factoring quiz which has been attempted 668 times by avid quiz takers. Also explore over 816 similar quizzes in this category.6. I can graph quadratic functions in vertex form (using basic transformations). 7. I can identify key characteristics of quadratic functions including axis of symmetry, vertex, min/max, y-intercept, x-intercepts, domain and range. Writing Equations of Quadratic Functions 8. I can rewrite quadratic equations from standard to vertex and vice ...6. I can graph quadratic functions in vertex form (using basic transformations). 7. I can identify key characteristics of quadratic functions including axis of symmetry, vertex, min/max, y-intercept, x-intercepts, domain and range. Writing Equations of Quadratic Functions 8. I can rewrite quadratic equations from standard to vertex and vice ... The quadratic formula helps you solve quadratic equations, and is probably one of the top five formulas in math. We’re not big fans of you memorizing formulas, but this one is useful (and we think you should learn how to derive it as well as use it, but that’s for the …Graphing Quadratics quiz for KG students. Find other quizzes for Mathematics and more on Quizizz for free! ... Which equation below is a quadratic? y=9x+5. y=3x 2-6. y=5x 3 +6. x=3 x. Multiple Choice. Edit. Please save your changes before editing any questions. 3 …In the following exercises, rewrite each equation in the form by completing the square. Answer. Graph Quadratic equations Using Transformations. In the following exercises, Rewrite each equation in. y = a ( x − h) 2 + k. form. Graph it by using transformations. y = x 2 + 6 x + 5.Show Answers See Preview Multiple Choice 1 minute 1 pt Find the minimum point of the graph x2 + 12x + 4 ( -12 , -32 ) ( -6 , -32 ) ( -6 , 32 ) ( 12 , -14 ) Multiple Choice 1 minute 1 …STEP 1: Find the vertex. To find x - coordinate of the vertex we use formula: So, we substitute in for and in for to get. To find y - coordinate plug in into the original equation: So, the vertex of the parabola is.Quadratic Equations quiz for 10th grade students. Find other quizzes for Mathematics and more on Quizizz for free! ... Find the minimum point of the graph x 2 + 12x + 4 ( -12 , -32 ) ( -6 , -32 ) ( -6 , 32 ) ( 12 , -14 ) Multiple Choice. Edit. Please save your changes before editing any questions. 1 minute.This test covers the following: -understanding what a solution means -knowing what an imaginary number is -solving by factoring (a=1 and a>1) -graphing quadratics-finding the discriminant & stating how many solutions -using the quadratic formula -giving a possible equation of a quadratic using a graph -identifying key features of a ...• Solve quadratic equations by completing the square. The Quadratic Formula and the Discriminant(pp. 313–319) 1 1 0.5 0.5 • Solve quadratic equations by using the Quadratic Formula. • Use the discriminant to determine the number and type of roots of a quadratic equation. Analyzing Graphs of Quadratic Functions(pp. 320–328) 2 1 1.5 0.5 ...375. Graphing Quadratics quiz for 6th grade students. Find other quizzes for Mathematics and more on Quizizz for free!To find the y -coordinate of the vertex, we substitute x= − b 2a into the quadratic equation. Example 10.5.7. For the parabola y = 3x2 − 6x + 2 find: the axis of symmetry and. the vertex. Answer. 1. The axis of symmetry is the line x= − b 2 a. Substitute the values of a, b into the equation.Section 5: Graph of a General Quadratic 16 5. Graph of a General Quadratic The final section is about sketching general quadratic functions, i.e. ones of the form y = ax2 +bx+c. The algebraic expression must be rearranged so that the line of sym-metry and the orthogonal axis may be determined. The procedure required is completing the square.Solve quadratic equations by factorising, using formulae and completing the square. Each method also provides information about the corresponding quadratic graph. Part ofThe Algebra 1 course, often taught in the 9th grade, covers Linear equations, inequalities, functions, and graphs; Systems of equations and inequalities; Extension of the concept of a function; Exponential models; and Quadratic equations, functions, and graphs. Khan Academy's Algebra 1 course is built to deliver a comprehensive, illuminating, engaging, and Common Core aligned experience!Algebra 1 >. Quadratic functions & equations >. Quiz 2. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.What characteristic of the graph of a quadratic function is immediately apparent when the equation is written as y = ax² + bx + c? the y-intercept. (0, c) Describe the transformations shown in the equation: y = -2 (x + 5)² - 7. 1. Reflection of the x-axis. 2. Vertical Stretch by factor of 2.How to: Graph a quadratic function in the form f(x) = a(x − h)2 + k. Determine whether the parabola opens upward (a > 0) or downward (a < 0). Find the equation of the axis of symmetry, x = h . Find the vertex, (h, k). Find the y -intercept, f(0). Find the point symmetric to the y -intercept across the axis of symmetry.Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. 8.1 Quiz: Graphs of Quadratic functions quiz for 10th grade students. Find other quizzes for Mathematics and more on Quizizz for free! ... Which equation represents a quadratic function that is narrower than the graph of y = x 2? y = -3x 2 + 2x - 8. y = -1/2 x 2 - 3x + 9. y = 4x + x 2. y = -x 2 - 1. Multiple Choice. Edit.We call this graphing quadratic functions using transformations. In the first example, we will graph the quadratic function f(x) = x2 by plotting points. Then we will see what effect adding a constant, k, to the equation will have on the graph of the new function f(x) = x2 + k. Example 5.6.1.Chapter 9: Quadratic and Exponential Functions: Apps Videos Practice Now; Lesson 1: Graphing Quadratic Functions. apps. videocam. create. Lesson 2: Solving Quadratic Equations by Graphing. apps. videocam. create. Lesson 3: Solving Quadratic Equations by Completing the Square. apps. videocam. create. Lesson 4: Solving Quadratic Equations by ...Graphing Quadratic Functions Quiz A. Name__________________________. Graph each of the following quadratic functions. a) Show your work to find the vertex of ...In order to graph a quadratic equation in standard form, the first two steps are to use the equation _____ to find the axis of symmetry, and then you can plug that value back into the equation to find the _____.3.8K plays. 8th - 9th. explore. library. create. reports. classes. Quadratic Functions Test quiz for 9th grade students. Find other quizzes for Mathematics and more on Quizizz for free! Quadratic Equations quiz for 10th grade students. Find other quizzes for Mathematics and more on Quizizz for free! ... Find the minimum point of the graph x 2 + 12x + 4 ( -12 , -32 ) ( -6 , -32 ) ( -6 , 32 ) ( 12 , -14 ) Multiple Choice. Edit. Please save your changes before editing any questions. 1 minute.OBJ: 1.5 - Graphing Quadratic Functions by Using Transformations 8. ANS: D PTS: 1 REF: Communication OBJ: 1.6 - Using Multiple Transformations to Graph Quadratic Functions 9. ANS: B PTS: 1 REF: Knowledge and Understanding OBJ: 1.6 - Using Multiple Transformations to Graph Quadratic Functions 10. ANS: C PTS: 1 REF: Knowledge and Understanding12 Oca 2016 ... ... quadratic graph is NOT, before diving into the quadratic graphs and equations. Quadratic equations. TOP TIP: This question is the perfect ...Vertex form. Graphing quadratic inequalities. Factoring quadratic expressions. Solving quadratic equations w/ square roots. Solving quadratic equations by factoring. Completing the square. Solving equations by completing the square. Solving equations with the quadratic formula. The discriminant.Now we will graph functions of the form f(x) = ax2 + bx + c if a ≠ 0. We call this kind of function a quadratic function. Definition 2.4.1. A quadratic function, where a, b, and c are real numbers and a ≠ 0, is a function of the form. f(x) = ax2 + bx + c. We graphed the quadratic function f(x) = x2 by plotting points. Figure 9.6.1.©V H2806124 v PKFu1t4aU 3S ao qfctMwba XrPe H hL 0L OCp. Y 5 SAqlml5 3rLi0grh mtAs1 krpeasZeLr SvLeMdC.9 j WM6a dBeV ywviPt dhr jIcn 1f1i 3nhi it qeT yA rlbg le kbArva t E2 N.K-3-Worksheet by Kuta Software LLC Answers to Graphing Quadratic Functions in Standard FormStudy Guides. Algebra I. Quiz: Solving Quadratic Equations. Preliminaries and Basic Operations. Preliminaries. Quiz: Preliminaries. Properties of Basic Mathematical …Chapter 9: Quadratic and Exponential Functions: Apps Videos Practice Now; Lesson 1: Graphing Quadratic Functions. apps. videocam. create. Lesson 2: Solving Quadratic Equations by Graphing. apps. videocam. create. Lesson 3: Solving Quadratic Equations by Completing the Square. apps. videocam. create. Lesson 4: Solving Quadratic Equations by ...Plotting points will help us see the effect of the constants on the basic f (x) = x 2 f (x) = x 2 graph. We fill in the chart for all three functions. The g(x) values and the h(x) values share the common numbers 0, 1, 4, 9, and 16, but are shifted.This is a formula, so if you can get the right numbers, you plug them into the formula and calculate the answer (s). We always have to start with a quadratic in standard form: ax^2+bx+c=0. Making one up, 3x^2+2x-5=0, we see a=3, b=2, c=-5. I teach my students to start with the discriminant, b^2-4ac. Also, especially in the beginning, put the b ...1) You can create a table of values: pick a value of "x" and calculate "y" to get points and graph the parabola. 2) If the quadratic is factorable, you can use the techniques shown in this video. 3) If the quadratic is not factorable, you can use the quadratic formula or complete the square to find the roots of the quadratic (the x-intercepts ... or. f (x) = ax² +bx + c. The U-shaped curve created by a quadratic equation. Parabola. The vertical line that divides the parabola into two equal parts. Axis of Symmetry. The formula for the axis of symmetry. x = -b/2a. The turning point of a parabola.quadratic formula quiz for 9th grade students. Find other quizzes for Mathematics and more on Quizizz for free! ... If the graph of a quadratic does not intercept the x-axis at any point, then it has: 1 Real Solution. 2 Real Solutions. Half a Solution. No Real Solution. Multiple Choice.Please save your changes before editing any questions. 15 minutes. 1 pt. The graph of a quadratic function is called a. Parabola. Vertex. Axis of Symmetry. Vertex Form. Multiple Choice.Draw the graph of \(y = x^2 -x - 4 \) and use it to find the roots of the equation to 1 decimal place. Draw and complete a table of values to find coordinates of points on the graph. xAlgebra Funsheets. This is a set of 5 worksheets on solving quadratic equations word problems.Worksheet 1 - Graphing quadratic equations. Given the function, students must graph, state vertex, axis of symmetry, solutions, 2 other points and use equation to find solution to a time or height problem. Worksheet 2 - Four vertical motion problems.y = x², which has a standard width of a=1. The smaller the absolute value of a, the . wider the parabola will be. Use your calculator to graph the parent function, y = x². Then, graph the following four quadratic equations on your calculator and compare their . widths to the standard width of the parent graph. 1.equation: y = (x + 3) (2x + 1) Zero Product Property Complete the Square 10 What method would you use to solve the equation: y = 4x2 + 10 Square Roots Method Quadratic Formula 11 What method would you use to solve the equation: y = x2 + 10x + 3 Square Roots Method Complete the Square 12 The discriminant is 24. How many andMuch as we did in the application problems above, we also need to find intercepts of quadratic equations for graphing parabolas. Recall that we find the y - y - intercept of a quadratic by evaluating the function at an input of zero, and we find the x - x - intercepts at locations where the output is zero. Please save your changes before editing any questions. 15 minutes. 1 pt. The graph of a quadratic function is called a. Parabola. Vertex. Axis of Symmetry. Vertex Form. Multiple Choice.Math Algebra Algebra I - Unit 8 Quadratic Functions, Equations, & Applications 5.0 (1 review) Quadratic Function Click the card to flip 👆 A function that can be written in the form f (x) = ax²+bx+c, where a,b,and c are real numbers and a ≠ 0 Click the card to flip 👆 1 / 16 Flashcards Learn Test Match Q-Chat tajones717 Teacher Top creator on QuizletStep 1 for Graphing: Write the quadratic in standard form. Identify a, b and c from the equation Step 2 for Graphing: Find the x-coordinate of the vertex: (-b/2a) Step 3 for …Get ready for questions on the unit so far. 6 questions 6 - 12 minutes. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.375. Graphing Quadratics quiz for 6th grade students. Find other quizzes for Mathematics and more on Quizizz for free!11.8K plays. 5th. 20 Qs. One Step Equations. 13.8K plays. 6th. classes. Quadratic Equations quiz for 10th grade students. Find other quizzes for Mathematics and more on Quizizz for free!To convert a quadratic function from standard form to intercept form, factor out the x and y terms. To graph a quadratic function in vertex form, start by finding the vertex. Then, find the x- and y-intercepts. Once you have found the vertex and the intercepts, sketch the parabola. Vertex form is often easier to use when finding the vertex of ...How to: Graph a quadratic function in the form f(x) = a(x − h)2 + k. Determine whether the parabola opens upward (a > 0) or downward (a < 0). Find the equation of the axis of symmetry, x = h . Find the vertex, (h, k). Find the y -intercept, f(0). Find the point symmetric to the y -intercept across the axis of symmetry.A quadratic equation is a second-order polynomial equation in a single variable x. ax2 + bx + c = 0 a x 2 + b x + c = 0. with a ≠ 0 . Because it is a second-order polynomial equation, the fundamental theorem of algebra guarantees that it has at least one solution. The solution may be real or complex. The roots x can be found by completing the ...Get ready for questions on the unit so far. 6 questions 6 - 12 m, We call this graphing quadratic functions using transformations. In the first example, we will graph the quadratic fu, Solve the quadratic equation below using three methods: graphing, factoring, and the quadratic formula. 2. 2), Draw the graph of \(y = x^2 -x - 4 \) and use it to find the roots of the, Study with Quizlet and memorize flashcards containing terms like What is the y-intercept of f(, intercept form. a quadratic function written in the form f (x) = a (x - p) (x - q) where a ≠ 0, Chapter Outline. 1.1 Use the Language of Algebra. 1.2 Integers. 1.3 Fraction, Lesson 8 - Introduction to Quadratic Functions Mini-Lesson , Quiz 8 1 Graphing Quadratic Equations - Displaying, Feb 26, 2021 · We call this graphing quadratic functi, Solve quadratic equations by factorising, using formulae and co, or. f (x) = ax² +bx + c. The U-shaped curve created by a quadratic equ, Graphing Quadratic Functions Quiz 1. Find the vertex of y = x2 + 2x -, equation of the following form. 5-1 Graphing Quadratic Functions The g, Integrated math 2 13 units · 134 skills. Unit 1 Absolute val, Unit 1 Properties of functions. Unit 2 Linear equation, Unit 1 Properties of functions. Unit 2 Linear equations, in, What characteristic of the graph of a quadratic function i.