Determine which pair(s) of function(s)represent inverses of each other.

1. f(x)= 8x+1
g(x)= 8x-8
2. f(x)= 3x+2
g(x)= x-2/3
3. f(x)= 5x+2
g(x)= x/5-2

What grade are you in and the function is x3 + 2