1. Which set of points represents a function?
A.
{(-3,5), (-3, 2), (0, 6), (8, - 4)}
B.
{(2,5), (2, 2), (9,- 6), (-3,-1)}
C.
{(1, - 9), (5, - 6), (1, 1), (2, 7)}
D.
(-2, 4), (4, - 2), (8, 3), (8,9)