y=mx+b

$\vec{p}$

$\vec{u}$

$\vec{x}$

g(x) = (0.5 * x) + 2
U = Point(g)
P = Point(g)
O: (0 | 0)
p = Vector(O, P)
u = Vector(P, U)
t = 2 (slider from -5 to 5)
X: P + (t * u)
w = Vector(O, X)
Text2: "\vec{x} = \underbrace{\left(\begin{array}{c} " + (LaTeX[x(p)]) + " \\ " + (LaTeX[y(p)]) + " \end{array}\right)}_{\substack{\vec{p}}}  + \underbrace{" + (LaTeX[t]) + "}_{\substack{t}} \cdot \underbrace{\left(\begin{array}{c} " + (LaTeX[x(u)]) + " \\ " + (LaTeX[y(u)]) + " \end{array}\right)}_{\substack{\vec{u}}} =\left(\begin{array}{c} " + (LaTeX[x(X)]) + " \\ " + (LaTeX[y(X)]) + " \end{array}\right)"