Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 9 - Quadratic Functions and Equations - 9-2 Quadratic Functions - Practice and Problem-Solving Exercises - Page 556: 12


Axis of symmetry: x=0 Vertex: (0,11)

Work Step by Step

$y=−4x^2+11$ The standard form for a quadratic equation is $y=ax^2+bx+c$ So a= -4, b= 0, and c= 11 Axis of symmetry: The formula for axis of symmetry is x=−b/2a $x=−(0)/2(−4)$ $x=0/−8$ x=0 Vertex: Plug in the x value of the axis of symmetry to find the y value of the vertex. $y=−4x^2+11$ $y=−4(0)^2+11$ y= 0 + 11 y=11 The vertex is (0,11)
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