Question

Which relation is a function?

Answer 1

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 2

A

Answer 3

A

Answer 4

A, because there cannot be a repetition of x in a function because, if you graph it out, it will result in a vertical line, which is undefined.