Question

PLEASE HELP! 15 POINTS!

Select the correct answer.
Which relation is a function?

A.
{(2, 3), (1, 5), (2, 7)}
B.
{(-1, 5), (-2, 6), (-3, 7)}
C.
{(11, 9), (11, 5), (9, 3)}
D.
{(3, 8), (0, 8), (3, -2)}

Answer 1

B is the correct one

Answer 2

For every x value, there should be only one y value. Or, for every input there is only one output.

A - Incorrect - there are two 2's for the x values and each of them has a different y value

B - Correct - all of the x values are different and all of the y values are different

C - Incorrect - there are two 11's for the x values and each of them has a different y value

D - Incorrect - there are two 3's for the x values and each of them has a different y value

Hope this helps! :)