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.
-{(2.11, 9.21) , (2.111, -9.2) ,

A) function domain:
Range: {9.21, -9.2, 0, -2}
B) function domain: {9.21, -9.2, 0, -2}
Range:
C) not a function