 \vec{ u }\;=\;(u_1;u_2) 

M_0\;=\;(x_0;y_0)

M\;=\;(x;y)

x\;=\;x_0\;+\;tu_1

y\;=\;y_0\;+\;tu_2

A = (0.860342300960474, 3.6431357478402453)
B = (2.1956661807108966, 4.504068249258283)
u = Vector(A, B)
M_0 = (1.440153985588947, 1.236038754079616)
Δ = Line(M_0, u)
M = Point(Δ)
v = Vector(M_0, M)