1. The problem asks to find the value of the function $f(x)$ at $x = -3$. 2. From the graph, we see the curve passes through the point $(-3, 5)$. 3. This means when $x = -3$, $f(x) = 5$. 4. Therefore, the value of $f(-3)$ is simply the $y$-coordinate of the point on the graph at $x = -3$. 5. Hence, $f(-3) = 5$. Final answer: $\boxed{5}$