\setlength{\unitlength}{0.75cm}
\referencesystem(0,0)(1,0)(0.25,0.75)
\begin{Picture}(-4.5,-4.5)(4.5,4.5)
\cartesiangrid(-4,-4)(4,4)
\thicklines
\pictcolor{blue}
\xLINE(-4,0)(1,4)
\Put(1,-3){\xLINE(0,0)(3,2)}
\pictcolor{red}
\xtrivVECTOR(0,0)(2,3)
\xtrivVECTOR(0,0)(2,0)
\arrowsize{10}{4}
\xtrivVECTOR(0,0)(-2,-1)

\pictcolor{magenta}
\xVECTOR(-3,-3)(-3,3)
\xVECTOR(-3,-3)(-2,-2)
\end{Picture}
