Date: 1 Mai 2013

a = -0.5 (slider from -5 to 5, step 1)
b = -0.5 (slider from -5 to 5, step 1)
c = 1.2 (slider from -5 to 5, step 1)
d = 0.5 (slider from -5 to 5, step 1)
e = 2.5 (slider from -5 to 5, step 1)
f = -2.8 (slider from -5 to 6, step 0.1)
g: (a * x) + (b * y) = c
h: (d * x) + (e * y) = f
S = Intersect(h, g)