Question

use the graph to find the intervals on which the function is increasing or decreasing. answer using interval notation.
increasing:
decreasing:

Explanation:

Step1: Identify increasing interval

Observe right of vertex $x=-3$: as $x$ increases, $f(x)$ increases. The interval is $(-3, \infty)$.

Step2: Identify decreasing interval

Observe left of vertex $x=-3$: as $x$ increases, $f(x)$ decreases. The interval is $(-\infty, -3)$.

Answer:

Increasing: $(-3, \infty)$
Decreasing: $(-\infty, -3)$