For what value(s) of k will the relation not be a function?

Question

A = {(1.5k−4, 7), (−0.5k+8, 15)}

Answer 1

for every value of x we want one and only one value of y
if
1.5 k - 4 = -0.5 k + 8
then we have TWO values of y for ONE value of x
k = 6 does it

Answer 2

Thanks:)

Answer 3

You are welcome.

Answer 4

LOLOLLOL UR MOM