generated by the following ${\displaystyle \mathrm{L}{}^{{}_{\mathrm{A}}}\mathrm{T}{}_{{\displaystyle \mathrm{E}}}\mathrm{X}}$ code:

\documentclass[a5paper]{article}
\usepackage{pgfplots}
\usepackage[light,math]{iwona}
\usepackage[T1]{fontenc}
\begin{document}
\thispagestyle{empty}
\begin{tikzpicture}
\begin{axis}[
restrict y to domain=-10:10, samples=1000,
width=10cm, height=8cm, xmin=-10, xmax=10,
xlabel=$x$,
ylabel=$\displaystyle\frac{1}{x}$,
axis x line=center, axis y line=center]
\addplot[red] gnuplot[domain=-10:10] {1/x};
\end{axis}
\end{tikzpicture}
\end{document}