\input{preamble-standalone.ltx}
\begin{document}

% Ex. No. 6 (Section  5.2.3 : Valeurs négatives)

\begin{tikzpicture}
  \tkzInit[xmin  = -40,
           xmax  =  60,
           ymin  = -40,
           ymax  =  60,
           xstep =  20,
           ystep =  20]
  \tkzAxeXY
\end{tikzpicture}

\end{document}
