Can anyone please help me solve these problems ASAP!!! I also need it to be done step by step to copy and turn it in

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.