Which set of ordered pairs represents y as a function of x?

Last updated: 7/20/2022

Which set of ordered pairs represents y as a function of x? A {(0, 0), (-1, 2), (-1, -2), (-2, 4), (-2,-4)} B {(0, 0), (1, 1), (2, 4), (3, 9), (3, 16)} C {(0, 0), (0, 1), (0, 2), (0, -1), (0, -2)} D {(0, 0), (-1,-0.5), (-2,-1), (-3,-1.5), (-4,-2)}