Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 2 - Graphs and Functions - 2.3 Functions - 2.3 Exercises: 87

Answer

(a) $(-2, 0)$ (b) $(-\infty, -2)$ (c) $(0, +\infty)$

Work Step by Step

(a) The graph is rising from $x=-2$ to $x=0$. Thus, the function is increasing in the interval $(-2, 0)$. (b) The graph is falling from $-2$ to the left. Thus, the function is decreasing in the interval $(-\infty, -2)$. (c) The graph is constant (horizontal) from $x=0$ to the right. Thus, the function is constant in the interval $(0, +\infty)$.
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