Precalculus (6th Edition) Blitzer

by Blitzer, Robert F.

Published by Pearson

ISBN 10: 0-13446-914-3

ISBN 13: 978-0-13446-914-0

Chapter 11 - Section 11.4 - Introduction to Derrivatives - Exercise Set - Page 1176: 73

Answer

(d).

Work Step by Step

This parabola is opening upward with a minimum at $x=0$. Its derivative will be negative when $x\lt0$, zero at $x=0$, and positive when $x\gt0$, matching graph-(d).

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