Answer: {-3, -1, 1, 2, 3}
=========================================
Step-by-step explanation:
The domain is the set of allowed x inputs. All you need to do is list the x coordinates of the points shown.
The points shown, from left to right are:
(-3, 2) (-1, 0) (1,0) (2, -2) and (3, 3)
The x coordinates of those points are: -3, -1, 1, 2, 3
We wrap them up in a set of curly braces to indicate a set of values.
-------------
Extra info: Because there are no repeated values in the domain, ie no repeated x values, this means this graph represents a function. The graph passes the vertical line test.