For #7-8, is the relation a function?
기) (4,2), (1,2), (0,1), (-2,2), (3,3)
8) (6,5), (4,3), (6,4), (5, 8)
For #7, the relation is not a function because the x-value of 2 is associated with both the y-values of 2 and 3.
For #8, the relation is also not a function because the x-value of 6 is associated with both the y-values of 5 and 4.