a = -1.9 (slider from -5 to 5, step 0.1)
b = 1 (slider from -5 to 5, step 0.1)
c = 2 (slider from -5 to 5, step 1)
A = Point(xAxis)
f: ((a * x(A)) * x(A)) + (b * x(A)) + c
B: (0, f)
d = OrthogonalLine(A, xAxis)
e = OrthogonalLine(B, yAxis)
C = Intersect(e, d)