A = Point(xAxis)
B = Point(xAxis)
C = Point(xAxis)
D = Point(xAxis)
E = Point(xAxis)
a = 0.05 (slider from 0 to 0.2, step 0.01)
f(x) = a * (x - x(A)) * (x - x(B)) * (x - x(C)) * (x - x(D)) * (x - x(E))