k = 2.7 (slider from -5 to 5, step 0.1)
u = (3, 1)
v: (k * u)
A = (2, -3)
B = Translate(A, u)
w = Vector(A, B)
M = Translate(A, v)
a = Vector(A, M)
texte1: "\overrightarrow{AM} =" + (LaTeX[k]) + " \ \overrightarrow{AB}"