Question

Which set of ordered pairs represents a function?

Answer 1

It would be D, because to be a function, a set of ordered pairs cannot have the same x value. The y value can be the same though.
(5,6), (8,6), (9,6) 
As you can see, all of the x values are different, so it is a function.

Answer 2

Your answer would be D. I’ve had this question!