A = (0.1466531372982789, -11.75593240442436)
C = (37.90111871818957, -11.755932404424358)
a = -0.25 (slider from -5 to 5, step 0.25)
b = 18.5 (slider from -30 to 30, step 0.5)
c = 13.6 (slider from -10 to 30)
f(x) = (a * (x - b)^(2)) + c