%
% tkz-euclide (14/01/2011)
%
% Coding (utf8) Creator (TeX) Producer (pdfeTeX) 
% Author Alain Matthes
\input{tkzfctpreamble.ltx}

\begin{document}

 \begin{tikzpicture}[]
 \tkzInit[ymax=20,ystep=5]
 \tkzAxeXY
 \tkzFct[color=red,domain=0:10,samples=2]{2*x+5}
 \tkzFct[color=blue,domain=0:10,samples=2]{-x+15}
 \tkzFct[color=green,domain=0:10,samples=2]{7} % 7/5=1
 \tkzFct[color=purple,domain=0:10,samples=2]{7.}%7.0/5 =1.2
\end{tikzpicture}

\end{document} 
