f(x) = log(x)
g(x) = exp(x)
a = 0.26 (slider from -2 to 2, step 0.01)
b = 2.09 (slider from 0.01 to 5, step 0.01)
T1: y = (x - a) * exp(a) + exp(a)
T2: y = (x - b) / b + log(b)
A: (a, g(a))
B: (b, f(b))