Answer
This graph is a function.
Work Step by Step
This is because there is only one $y$ value for every $x$ value. For further explanation, this graph is the function of -$ax^{2}-c$.
Calculus Concepts: An Informal Approach to the Mathematics of Change 5th Edition
by LaTorre, Donald R.; Kenelly, John W.; Reed, Iris B.; Carpenter, Laurel R.; Harris, Cynthia R.
Published by
Brooks Cole
ISBN 10:
1-43904-957-2
ISBN 13:
978-1-43904-957-0
Chapter 1 - Ingredients of Change: Functions and Limits - 1.1 Activities - Page 12: 45
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