α = -4 (slider from -5 to 5, step 0.1)
β = -2 (slider from -5 to 5, step 0.1)
a = 2.2 (slider from -5 to 5, step 0.1)
f(x) = a * (x - α)^(2) + β
E: (α, β)
b: x = α
c: y = β