Question

Which of the following relations represents a function?




A. {(1, 1), (1, 2), (1, 3)}

B. {(1, 1), (2, 1), (3, 1)}

C. {(1, 1), (2, 2), (3, 3)}

D. Both B and C.

Answer 1

Function is defined as one which has a many to one relationship or one to one relationship.
So one x value can lead to one y value or many x values can lead to one y value.

Answer 2

So both B and C represents a function.