\documentclass[12pt]{article}
\usepackage{pstricks}
\pagestyle{empty}
\textwidth=1.2\textwidth
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\begin{document}

{\LARGE$$y^2 = x^3 + 1$$}

\begin{center}
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\pscircle*[linecolor=red](2,3){0.1}\rput(2.5,3){$(2,3)$}
\pscircle*[linecolor=red](0,1){0.1}\rput(0.5,1){$(0,1)$}

\psline[linewidth=0.03]{->}(-2,0)(5,0)\rput(5.2,0){$x$}
\psline[linewidth=0.03]{->}(0,-5)(0,5)\rput(0,5.2){$y$}

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\endpspicture

\vspace{.5in}
Add $(0,1)$ and $(2,3)$ together!
\end{center}

\end{document}