In this graph, we can observe a line that starts at the point $(-2, -3)$ and extends indefinitely towards the left side of the graph, which indicates that the domain covers all $x$-values from $-\infty$ to $-2$. Since there's no indication that the graph has any other restrictions, the domain is bounded at $x = -2$ (inclusive).

Thus, the domain in interval notation is:

$(-\infty, -2]$

Would you like further details, or do you have any questions?

Here are some related questions you might find useful:

1. How do you determine the range of a function from a graph?
2. What does it mean when the domain extends to infinity?
3. How do you determine if a function is continuous from its graph?
4. Can a graph have multiple domains?
5. What happens when a function's domain includes an endpoint that is not defined?

Tip: Always check if the endpoints are included or excluded in the domain by looking for open or closed circles at the endpoints.