Question

Which relation is a function?

A. {(-5, 1), (4, 9), (6, 10)}
B. {(0, 3), (0, 9), (12, -4)}
C. {(5, 5), (5, 9), (5, 15)}
D. {-2, 10), (-6, 10), (-2, 3)}

Answer 1

A function cannot have two different y-values for the same x-value. ;)

Answer 2

Incorrect ^^.

Answer 3

@iPwnBunnies So it's not D or C, so it has to be either A or B

Answer 4

I think it's A

Answer 5

Of course it's A! Why was B in your final decision?

Answer 6

I am kinda tired so B's numbers looked a little fuzzy

Answer 7

Lol, well it is A, lol. Choice B's set of numbers had (0,A) and (0,B) in it, so this cannot be a function since there are 2 y-values for a single x-value, 0.

Answer 8

Oh okay I get it now. Thanks!