b = -0.3 (slider from -5 to 5, step 0.01)
a = -0.25 (slider from -5 to 5, step 0.05)
k = 3 (slider from -5 to 5, step 0.1)
c(x) = (a * x^(2)) + b
Q = Point(c)
B = Intersect(xAxis, yAxis)
g = Line(Q, B)
c_1 = Circle(Q, k)
P, P' = Intersect(c_1, g)
Ortslinie1 = Locus(P', Q)
Ortslinie2 = Locus(P, Q)
d = Segment(Q, P)
e = Segment(Q, P')