f(x)=a\left| b(x-h)| +k

a = 1.4 (slider from -20 to 20, step 0.1)
b = -1.8 (slider from -20 to 20, step 0.1)
h = -0.6 (slider from -20 to 20, step 0.1)
k = -5.2 (slider from -20 to 20, step 0.1)
f(x) = (a * abs((b * (x - h)))) + k
texte1 = LaTeX(f, true, true)
texte3: "axe de symétrie: x = " + (LaTeX[h]) + ""
g: x = h