Question

Which of the following relations is a function?

A.
(8, 1), (-1, 4), (1, 1), (8, 2)

B.
(1, 4), (-1, 2), (8, 1), (-6, 2)

C.
(1, 0), (-1, 3), (8, 1), (-1, 5)

D.
(1, 4), (-1, 6), (1, 3), (-6, 2)

Answer 1

If there are any repeating X values, it is not a function. Therefore, B is a function.