PLEASE HELP ME!!

Identify the set of ordered pairs that represents y as a function of x.

A - {(0, −2), (0, −1), (0, 1), (0, 2)}

B - {(0, 0), (1, 1), (1, 1), (3, 3)}

C - {(0, −2), (0, −1), (0, 1), (0, 2)}

D - {(−2, 0), (−1, 0), (1, 0), (2, 0)}