Functions Modeling Change: A Preparation for Calculus, 5th Edition

Published by Wiley
ISBN 10: 1118583191
ISBN 13: 978-1-11858-319-7

Chapter 2 - Functions - Strengthen Your Understanding - Page 114: 45

Answer

True.

Work Step by Step

Take the function $y=-x^2$ for all positive $x$ values. The function is decreasing and the rate of change becomes more negative, meaning that the function is concave down. This makes the function prove the truth of the statement.
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