%% 
%%  A DANTE-Edition example
%% 
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}
\usepackage[utf8]{inputenc}
\AtBeginDocument{%
  \def\pshlabel#1{\footnotesize #1}
  \def\psvlabel#1{\footnotesize #1}}

\usepackage{pstricks,pst-plot,multido,amsmath}

\begin{document}
\psset{unit=0.8}
\begin{pspicture*}(-0.75\linewidth,-7)(0.75\linewidth,5)
\psaxes{->}(0,0)(-0.7\linewidth,-7)(0.7\linewidth,5)
\psset{plotpoints=200}
\multido{\rA=1+1}{7}{
  \psplot{-6}{-0.2}{x 4 mul \rA\space sub x dup mul div}}
\multido{\rA=1+1}{7}{
  \psplot{0.1}{6}{x 4 mul \rA\space sub x dup mul div}}
\rput[lb](-5.3,2){${y=\dfrac{4x-t}{x^2}}$ for ${t\in\{1,...,7\}}$}
\end{pspicture*}
\end{document}