The relation is the set of ordered pairs of point drawn in the graph
The points are:
(-2, 3), (0, 1), (2, -1), (3, -2)
So the relation is:
R = {(-2, 3), (0, 1), (2, -1), (3, -2)}
The domain is the values of x in the ordered pairs
x = -2, 0, 2, 3
The domain = {-2, 0, 2, 3}
The range is the values of y in the ordered pairs
y = 3, 1, -1, -2
Arrange them in the set
The range = {-2, -1, 1, 3}