Question

Which relation is a function?

A.
x -2 -2 0 1 8
y 3 6 0 0 9


B.
x 3 5 7 14 14
y -9 5 -9 1 2


C.
x -3 4 5 9 12
y 1 -2 -2 0 7


D.
x -7 -5 6 8 8
y -3 8 1 1 -9

Answer 1

B?

Answer 2

@sleepyjess

Answer 3

C
A function is one in which an X has a unique Y value. In all the other cases, same X yields multiple values.

Answer 4

Functions do not have multiple x values that are the same.