Question

Determine which relation is a function.

A. (0, 1), (1, 1), (2, 3), (3, 4), (4, 5)
B. (0,0), (0, 1), (1, 0), (2, 2), (3, 3)
C. (-2, 1), (0, 3), (-2, 2), (4, 1), (1, 4)
D. (-3,2), (1, 4), (0, 0), (2, 3), (-3, 5)

Answer 1

A

Explanation:

One easy way to determine if a coordinate is a function or not is to look at the number in the x's place only. There should not be the same number on the x's side for a different pair.

Every pair has a different number on the x's side, which is why A is the only possible answer.