[Bladez]

So i need some help on this problem confused :?:

(1.)Which of the following does not represent a function?

(A.)x −25 −10 11 14 17
y −50 −20 22 22 34

(B.)x −1 1 3 4 5
y −2 2 6 8 10

(C.)x 24 21 3 24 4
y 1 4 22 5 4

(D.)x 24 21 6 4 20
y 48 42 12 8 40