## Precalculus (6th Edition) Blitzer

(a) is increasing on the interval $(-\infty, -1)$ (b) is decreasing on the interval $(-1, +\infty)$ (c) has no interval where it is constant
Based on its graph, the given function: (a) is increasing on the interval $(-\infty, -1)$ (b) is decreasing on the interval $(-1, +\infty)$ (c) has no interval where it is constant