Question

Determine which relation is a function.

A.

{(–4, 3), (–2, 3), (–1, 2), (2, 5), (3, 2)}








B.

{(–4, 1), (–2, 3), (–2, 1), (–1, 5), (3, 2)}








C.

{(–4, 1), (–2, 3), (–1, 2), (3, 5), (3, 2)}








D.

{(–4, 1), (–2, 3), (–1, 1), (–1, 5), (3, 2)}

Answer 1

A

Answer 2

A Function will have only one Y for the values of X, Have a look and see which ones of these has points that have the same X value but a different Y value.

Answer 3

Thank you both!

Answer 4

you can see easily that A is a function