Question

Which set of ordered pairs represents a function?

a {(0, 1), (1, 3), (1, 5), (2, 8)}
b {(0, 0), (1, 2), (2, 6), (2, 8)}
c {(0, 0), (0, 2), (2, 0), (2, 4)}
d {(0, 2), (1, 4), (2, 6), (3, 6)}

Answer 1

It is D. because no numbers repeat on the x-value which makes it okay.

Correct me if I am wrong

Answer 2

The answer is D because none of the x-values are repeating which makes it a function.