Determine Whether The Following Relation Is A Function

{(2,-8), (2,4) (6,5) (8, -2) (10, -3)

This is not a function because you have two y values for the same x value (2,-8) and (2,4)

Evaluate The Following Function

G(x) = 5x + 3; G(x-1)

G(x-1) = 5(x-1) + 3

G(x-1) = 5x - 5 + 3

G(x-1) = 5x - 2