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

\documentclass[margin=5mm]{standalone}
\usepackage[nonpgfplots]{tkz-grapheur}

\begin{document}

\begin{GraphiqueTikz}[x=2.4cm,y=1.2cm,Xmin=0,Xmax=6,Xgrille=1,Xgrilles=1,Ymin=0,Ymax=6,Ygrille=1,Ygrilles=1]
	\TracerAxesGrilles[Elargir=2.5mm]{auto}{auto}
	\TracerCourbe[Couleur=red,Debut=0.01]{x-log(x/4)}
	\draw[red] (5,5) node[above right,font=\large] {$\mathcal{C}_f$} ;
\end{GraphiqueTikz}

\end{document}