The domain is a set tht contains all possible x-values in a relataion or a function. In this problem, we just need to know what the x-coordinates are to be able to identify the domain.
Let us first list down the coordinates of the given points. We have:
The x-coordinates are: -3, -1, 1, 3, and 6.
So the domain is: {-3, -1, 1, 3, 6}. The answer is option C.
