Answer
The function $f$ is increasing on the following intervals:
$(-8, -2)$;
$(0, 2)$; and
$(5, 7)$
Work Step by Step
The graph shows that that the function $f$ is increasing on the following intervals:
$(-8, -2)$;
$(0, 2)$; and
$(5, 7)$
After all, these are the intervals for which the function is rising from left to right.