The problem asks us to identify the interval on which the given function is decreasing. The x-coordinates should be integers or values like 0.5, 1.5, etc.

1. Problem Description

The problem asks us to identify the interval on which the given function is decreasing. The x-coordinates should be integers or values like 0.5, 1.5, etc.

2. Solution Steps

We need to visually inspect the graph and determine where the function is decreasing (i.e., where the graph is going downwards as we move from left to right).

The function has a local maximum at $x = -1$. From $x = -3$ to $x = -1$, the function increases.

The function decreases from $x = -1$ to $x = 1$.

After $x = 1$, the function increases again.

Therefore, the function is decreasing on the interval $(-1, 1)$.

3. Final Answer

-1 < x < 1