Code: Select all
\begin{centering}
\setlength{\unitlength}{.55cm}
\begin{picture}(1,1)
\put(1,-11){\vector(0,1){10}}
\put(0,-10){\vector(1,0){10}}
\put(1.15,-0.65){$y$}
\put(9.95,-10.55){$x$}
\linethickness{.25mm}
\put(0,-1){\line(1,-1){10}}
\qbezier(0,-9.75)(3.35,-11.5)(7,-1)
\end{picture}
\end{centering}