Gegenvektor
Author: Markus Hohenwarter

A = (1, 1)
B = (5, 5)
t = 0.7000000000000001 (slider from -2 to 2, step 0.1)
a = Vector(A, B)
b: t a
T: A + b
T1: "\vec{AB} \, = \, " + a
T2: t + "\cdot \vec{AB} \, = \, " + b