Question

Last one (for now)

Which of the following relations describes a function?
A.
{ (-1, -2), (-2, -1), (1, 2), (2, 1) }

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

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

D.
{ (0, 0), (0, 1), (1, 0), (1, 1) }

Answer 1

A

Explanation:

Answer 2

Answer: A

Hope this helps :)