Question

Which relation does not represent a function?

a.(-9, 3), (-2, 1), (1, 3), (5, -6)

b.(2, 0), (4, 8), (7, 5), (1, 5)

c.(-6, 2), (2, 5), (-4, 0), (2, 6)

d. (-4, 6), (-1, 1), (0, 4), (4, 7)

Answer 1

which relation tries to send an x-value to two different y-values? If you're going to be a function, you've got to make up your mind about where each x goes ... for example, in part (a.) the -9 goes to 3.

Answer 2

c
For the same value of x=2, there 2 different values of y.
Fail vertical line test.