a: 1
D: (2, 4)
E: (-1, 1)
f = Line(E, D)
c: y = (a * x^(2))
M = Midpoint(E, D)
g = Line(M, yAxis)
B = Intersect(c, g)
A' = Mirror(M, B)
h = Line(D, A')
i = Line(E, A')
Pol = Polar(f, c)