Precalculus (6th Edition)

(a) increasing over the interval $(2, +\infty)$; (b) decreasing over the interval $(-\infty, -2)$; and (c) constant over the interval $(-2, 2)$
Note that the graph in Exercise 22 is: falling from the left up to $x=-2$; constant/flat in $(-2, 2)$; and rising from $x=2$ to the right Therefore, the graph in Exercise 22 is: (a) increasing over the interval $(2, +\infty)$; (b) decreasing over the interval $(-\infty, -2)$; and (c) constant over the interval $(-2, 2)$