k = 5 (slider from -5 to 5, step 0.5)
f(x) = 2 x - 3 + k / (2 x - 1)
g(x) = 2 x - 3
m = 5.200000000000001 (slider from -10 to 10, step 0.1)
h(x) = -2 x
i(x) = h(x) + m