Which relation does not represent a function?

(−7, 3), (−3, 1), (1, −4), (5, −6)

(−4, 2), (1, 5), (−4, 0), (5, 6)

(2, 0), (4, 8), (6, 5), (10, 5)

(−3, 6), (−1, 1), (0, 4), (3, 7)

Question

Which relation does not represent a function?

 (−7, 3), (−3, 1), (1, −4), (5, −6)

 (−4, 2), (1, 5), (−4, 0), (5, 6)

 (2, 0), (4, 8), (6, 5), (10, 5)

 (−3, 6), (−1, 1), (0, 4), (3, 7)

mertsj · Answer

Remember this:  A function is a set of ordered pairs in which no two ordered pairs have the same first number.

anonymous · Answer

It would be B

anonymous · Answer

Oh, im sorry @Mertsj  didn't see u there...

mertsj · Answer

Also it is best not to just give answers regardless of who is answering.