k = 0.7 (slider from -5 to 5, step 0.1)
d = 0.5 (slider from -5 to 5, step 0.1)
f(x) = k * x + d
A: (0, d)
B: (1, d)
C: (1, d + k)
Steigungsdreieck, c, a, b = Polygon(A, B, C)
Text1 = LaTeX(k, true, true)
Text2 = LaTeX(d, true, true)