Question

Which set of ordered pairs represents a function?

A {(0, 0), (0, 1), (0, 2), (0, 1)}
B {(0, 0), (1, 1), (1, −1), (4, 2)}
C {0, 2), (1, 2), (2, 2), (3, 2)}
D {(1, 2), (3, 4), (1, 4), (3, 2)}

Answer 1

answer: c

each input has exactly one output!

Answer 2

Set C { (0, 2), (1, 2), (2, 2), (3, 2) } represents a function because each input (x-value) has exactly one output (y-value).