Determine whether the relationship is a function. Complete the explanation.
(0,4), (6,9), (1,2), (7,3), (6,8)

This ain't a function because you got 2 inputs that has 1 output. That is illegal in the world of math. (No one-to-many relationships)
You have (6,9) (nice) and (6,8) which is a one-to-many relationship.