Question

A.) {(3,5), (-1,7), (3,9)} B.) {(1, 2), (3, 2), (5, 7)} C.) {(1, 2), (1, 4), (1, 6)} Which of the following sets represents a function?

Answer 1

A and C are not. As you can see, in both sets, one value of x can represent two different values of y.