Question

Which set of ordered pairs does not represent a function?

A.{(−4,3),(8,3),(−2,−3),(7,7)}
B.{(−2,−5),(0,−2),(9,9),(2,1)}
C.{(9,3),(5,4),(3,−3),(−6,−3)}
D.{(6,1),(8,2),(−4,5),(6,3)}

Answer 1

D because X values can not repeat, for it to be a function it must pass the vertical line test and if we graphed that, a vertical line would hit two spots, therefore D is not a function.