In which choice is
not a function of x?
A(2, -3), (-2, 3), (3,-2), (3, 2)
B. (2, 3), (3, 4), (-4, 5), (-5, 6)
c. (3,-2), (3, 2), (3, 3), (2, 2)
D. (1, 1), (1, 2), (2, 3), (3, 4)