f(x) = 1.0 / x
A = (1, 1)
a = 8.7 (slider from -15 to 15, step 0.1)
M: (a, 1.0 / a)
B = (0, 0)
C = (0, 1)
b = Line(C, B)
c = Line(M, b)
A' = Mirror(A, c)
d = Line(M, A')
D = Intersect(f, d, (-1.0, -1.0))