m = -0.2 (slider from -5 to 5)
n = 2 (slider from -5 to 5)
f(x) = (m * x) + n
q = 1 (slider from -5 to 5)
r = -4 (slider from -5 to 5)
g(x) = (q * x) + r
S = Intersect(f, g)