Answer
(a) increasing over the interval $(2, +\infty)$;
(b) decreasing over the interval $(-\infty, -2)$; and
(c) constant over the interval $(-2, 2)$
Work Step by Step
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 $(-2, 2)$
