Question

determine all intervals on which the graph of f is increasing.

Explanation:

Step1: Recall increasing - function property

A function $y = f(x)$ is increasing on an interval if for any two points $x_1$ and $x_2$ in the interval with $x_1

Step2: Identify intervals from the graph

Looking at the given graph of the function $f(x)$, we can see that the graph is moving upward (i.e., increasing) on the intervals $(-9,-7)$ and $(0,2)$ and $(7,9)$.

Answer:

$(-9,-7),(0,2),(7,9)$