Use interval notation to write the intervals over which $f$ is $($a$)$ increasing, $($b$)$ decreasing, and $($c$)$ constant.

Part $1$ of $3$

$20$

$21$

$22$

tify the location and value of any relative maxima or minima of the function. Ignore points on the boundary of the graph. If there is more than one answer, rate them with the "and" button.