Question

Which relation represents a function?

A. (0,0) / ( 2,3) / ( 2,5) / ( 6,6)
B. (3,5 ) / (8,4) / (10,11) / (10,6)
C. (-2,2) / (0,2) / ( 7,2) / (11,2)
D. (13,2) / (13,3) / (13,4) / (13,5)

Answer 1

C is the rigth answer because all the other three has two x values in common. :)