Question

list the interval(s) on which f is decreasing.
the interval(s) on which f is decreasing is/are .
(type your answer in interval notation. use a comma to separate answers as needed.)

Explanation:

Step1: Identify decreasing - part of graph

A function is decreasing when the y - values decrease as the x - values increase.

Step2: Read intervals from graph

From the graph, the function is decreasing on the intervals $(-10,-8)$ and $(0,2)$ and $(6,8)$.

Answer:

$(-10,-8),(0,2),(6,8)$