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: 16



Work Step by Step

a = -1, b=-6, c=0. The equation has a negative coefficient so it opens downward.To find the axis of symmetry, use the formula -b/2a. plug your a and b values into this equation to get the answer -3. Answer choice C is the only one of the answer choices with the axis of symmetry x=-3 and open downward. Therefore, the answer is C.
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