Question

Which set(s) represents a function?

Answer 1

Answer:

All except the 3rd one {(12, 12), (12, 13), (12, 14)} are functions

Step-by-step explanation:

In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y.

This means that as long as some X does not give different Y values it is a function.

Answer 2

Answer:

1, 2, 3

Step-by-step explanation:

If the y's (right numbers have more than one number its not a function) hope this helps! :)