Determine Whether the Relation Represents a Function

Multiple Choice

Determine whether the relation represents a function. If it is a function, state the domain and range.
-{( -2, 2) , ( -1, -1) , (0, -2) , ( 1, -1) , ( 3, 7) }

A) function
Domain: { -2, -1, 0, 1, 3}
Range: { 2, -1, -2, 7}
B) function
Domain: { 2, -1, -2, 7}
Range: { -2, -1, 0, 1, 3}
C) not a function