% !TeX TXS-program:compile = txs:///pdflatex

\documentclass[margin=5mm]{standalone}
\usepackage{ProfLycee}

\begin{document}

\begin{tikzpicture}[x=1cm,y=1cm,xmin=-1,xmax=15,xgrille=1,xgrilles=0.5,ymin=-1,ymax=4,ygrille=1,ygrilles=0.5]
	\GrilleTikz \AxesTikz[ElargirOx=0/0,ElargirOy=0/0] \AxexTikz{1} \AxeyTikz{1}
	\draw (0,0) node[below left=2pt] {0} ;
	\draw (13.7,0) node[below=2pt] {$13,7$} ;
	\clip (\xmin,\ymin) rectangle (\xmax,\ymax) ;
	\draw[ultra thick,domain=0:13.7,samples=500] plot (\x,{0.06*(-\x*\x+13.7*\x)}) ;
	\draw[very thick,darkgray,domain=0:13.7,samples=500] plot (\x,{(-0.15*\x+2.2)*exp(0.2*\x)-2.2}) ;
	\draw (1.75,1.75) node[font=\Large] {$\mathcal{C}_f$} ;
	\draw[darkgray] (12.9,2) node[font=\Large] {$\mathcal{C}_g$} ;
\end{tikzpicture}

\end{document}