f(x)=b·a^x+c

a = 2 (slider from 0 to 5, step 0.1)
b = 2.1 (slider from -5 to 5, step 0.1)
c = 0 (slider from -5 to 5, step 0.1)
g(x) = 2^(x)
f(x) = b * a^(x) + c