f(x) = 1 / x
c = 0 (slider from -5 to 5, step 0.5)
g(x) = 1 / x + c
gl1: x = 1
A = Intersect(gl1, xAxis)
B = Intersect(f, gl1, (1, 1))
C = Intersect(g, gl1, (1, 1))
gl2: x = 2
gl3: x = 3
gl4: x = -2
D = Intersect(f, gl2, (2, 0.5))
E = Intersect(g, gl2, (2, 0.5))
F = Intersect(g, gl3, (3, 0.3333333333333333))
G = Intersect(f, gl3, (3, 0.3333333333333333))
H = Intersect(g, gl4, (-2, -0.5))
I = Intersect(f, gl4, (-2, -0.5))
u = Vector(I, H)
v = Vector(B, C)
w = Vector(D, E)
a = Vector(G, F)