Question

Which relation does not represent a function?

A. (-8, 4), (-3, 2), (1, 3), (5, -8)
B. (2, 0), (4, 6), (7, 6), (8, 5)
C. (-4, 6), (-1, 1), (0, 4), (4, 7)
D. (1, 2), (2, 5), (5, 7), (1, 3)

Is it D, because I know that domain can't repeat but can the domain be a 0? I can't remember...

Answer 1

the one where there is a repeated first coodinate

Answer 2

so yes, D is not a function

Answer 3

So D, okay, thank you!!