The graph you provided seems to depict a piecewise function. It is segmented into different sections that appear to have distinct behaviors over specific intervals of the x-axis.

Breakdown of the graph:

1. For $x < 0$:
   The graph is a horizontal line along $y = -1$, meaning the function is constant with $f(x) = -1$ in this interval. This line segment stops at the point $(-1, -1)$ and is closed at that endpoint.

2. At $x = 0$:
   There is an open circle at $(0, 0)$, meaning the function is not defined at this point (it's a "hole" in the graph).

3. For $0 < x \leq 2$:
   The graph increases linearly between $(0, 0)$ (open) and $(2, 3)$ (closed), with the function having a positive slope in this region. The slope here suggests that the function is increasing linearly.

Function Interpretation:

This can likely be expressed as a piecewise function: