\documentclass{standalone}

\usepackage{/media/documents/Cours/Prof/Enseignements/tools/style/base}
\usepackage{tkz-fct}
\usepackage{tikz}



\begin{document}

    \begin{tikzpicture}[xscale=0.6, yscale=0.4]
        %\repere{-0.5}{12.9}{-0.5}{15.9} 
        %\draw[red] plot[samples=200,domain=-1:2] function {x**2};
        \tkzInit[xmin=0,xmax=300,
         ymin=0,ymax=35 000,
         xstep=20,ystep=2000]
        \tkzAxeX[thick, poslabel=right,label=]
        \tkzAxeY[thick, poslabel=above,label=]
        \tkzDrawX[label={\textit{Quantité de visseuses}},below= -12pt]
        \tkzDrawY[label={\textit{Montant (en \euro)}}, below=-10pt]
        \tkzGrid

        \tkzFct[domain=0:300,color=blue, very thick]{0.3*\x*\x + 3*\x + 3000}
        %\tkzText[above right,color=blue](24,655){$\mathcal{C}_C$}

    \end{tikzpicture}

\end{document}