Question

Which of the following relations is a function?

Answer 1

The answer to your question is b

Answer 2

$A.\\(\boxed{3}, 1),\ (-3, 4),\ (-5, 1)\, (\boxed{3}, -5)-NO\\\\B.\\(-5, 1),\ (-3, -5),\ (3, 5)\, (6, 1)-YES\\\\C.\\(\boxed{-5}, 4),\ (-3, 6),\ (\boxed{-5}, 3),\ (6, 2)-NO\\\\D.\\(-5, 1),\ (\boxed{-3}, 4),\ (3, -5),\ (\boxed{-3}, 6)-NO$