f(x) = 1 / x
a = 0 (slider from -10 to 10, step 0.1)
AV: x = -a
b = 0 (slider from -10 to 10, step 0.1)
AH: y = b
k = 1 (slider from -10 to 10, step 0.1)
g(x) = k / (x + a) + b