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: 19



Work Step by Step

$a = 1, b = 6, \space \text{and} \space c = 0.$ a is represented by a Positive coefficient, so the graph opens upward. Use the axis of symmetry formula,$ -b/2a$ to find the axis of symmetry. $$-(6)/2(1)\\ -6/2\\ -3$$ After solving, we find that our axis of symmetry is x = -3. These characteristics best represent answer choice A.
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