xmax = 10.4 (slider from -5 to 200)
xmin = -10.6 (slider from -200 to 5)
ymax = 97.8 (slider from -5 to 200)
ymin = -89.8 (slider from -200 to 5)
h = 0.5 (slider from -10 to 10, step 0.5)
k = 0 (slider from -10 to 10, step 0.5)
a = 0.5 (slider from -10 to 10)
f(x) = (a * (x - h)^(2)) + k
b = 1 (slider from -10 to 10)