To determine the domain of the graph, we need to identify all the distinct x-values of the points plotted on the coordinate plane.

By inspecting the graph:

• There are 6 points on the graph.
• The x-coordinates (domain values) of these points appear to be: $-3, -1, 1$.

So, the domain of the graph is $\{-3, -1, 1\}$.

This matches option B: {-3, -1, 1}.

Let me know if you would like more details, or if you have further questions.

Follow-up questions:

1. What is the range of the graph based on the plotted points?
2. How is the domain of a function related to its graph?
3. Can a graph have multiple points with the same x-coordinate?
4. What happens to the domain when a graph is continuous, unlike this discrete graph?
5. How would you determine the range from a set of points?

Tip: Remember, the domain refers to all possible x-values, while the range refers to all possible y-values. Always check both when analyzing a graph.