In hypothesis testing, a key element in the structure of the hypothesis is that the claim is _?

The graph shows the function f(x) = (2.5)x was horizontally translated left by a value of h to get the function g(x) = (2.5)x–h.

Does anyone know how to do geometryme with this problem

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)