State if the given functions are inverses. 1) h(x)= 1/3x + 11/3 f(x) = 3x - 11
2) f(x)= 3x-6/4 g(x)= 6+4x/3
3) f(x)= 2-1/4x h(x)= -4x+8
4) g(x)= -3x-8 f(x)= x+1​

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.