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

A function is a special relationship where each input has a single output.

A. The set {(3, 5), (-1, 7), (3, 9)} doesn't represent a function, because input x=3 has two outputs  and

C. The set {(1, 2), (1, 4), (1, 6)} doesn't represent a function, because input x=1 has three outputs  and

B. The set {(1, 2), (3, 2), (5, 7)} represents a function, because each input has a single output.

correct choice is B.

Step-by-step explanation:

what i would say the best answer is a. 40.5

x coordinate is none

step-by-step explanation: