Posted by **Piggy** on Monday, January 21, 2013 at 12:56am.

Which of the following is a function?

A) -x^2 + 2y^2 - 4 = 36

B) {(6, -5), (-1, -5), (-4, -5)}

C) {(-5, -4), (-5, -3), (-3, 6)}

D) x = y^2 - 3

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