A.
Yes, This relation is a function because for every x, there is only one value of y.
B.
Domain of a function y=f(x) is the values which x can take.
Domain = {-4, -3, -2, 0, 2, 3}
C.
Range of a function y=f(x) is the values which y can take.
Range = {-3, -1, 0, 2, 3}
D.
From the graph, we can see that when x=2, y =-3.
