a = 1 (slider from -5 to 5)
b = 1 (slider from -5 to 5)
c = 1 (slider from -5 to 5)
d = 1 (slider from -5 to 5)
e = 1 (slider from -5 to 5)
f(x) = (a * x^(4)) + (b * x^(3)) + (c * x^(2)) + (d * x) + e