Answer
See below.
Work Step by Step
The vertex of a parabola is the highest point if $a\lt0$.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 8 - Section 8.3 - Quadratic Functions and Their Graphs - Concept and Vocabulary Check - Page 625: 3
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