a = 1 (slider from -5 to 5, step 0.1)
b = -1.7 (slider from -5 to 5, step 0.1)
m = 1.2 (slider from -5 to 5, step 0.1)
f(x) = m * x + 3.0 + a / (x - b)
c: y = m * x + 3.0
d: x = b