Question

determine all intervals on which $f(x) \leq 0$.

Explanation:

Step1: Identify where $f(x) \leq 0$

Look for parts of the graph that lie on or below the x-axis ($y=0$).

Step2: Check x-axis intersections/regions

The entire graph of $f(x)$ is above the x-axis (all $y$-values are greater than 0 for every visible $x$-value, and the lowest points of the graph are above $y=0$). There are no intervals where $f(x)$ is equal to or less than 0.

Answer:

There are no intervals where $f(x) \leq 0$.