test
Author: Ne vem

f(x) = a x² + b x + c

a = 1 (slider from -5 to 5, step 0.1)
b = 0 (slider from -5 to 5, step 0.1)
c = 0 (slider from -5 to 5, step 0.1)
f(x) = a * x^(2.0) + b * x + c