\begin{tikzpicture} \tkzInit[xmax=5.5,ymin=1000,% ymax=6000,ystep=2000] \tkzGrid[color=orange!30] \tkzDrawX[label=$m$,below=13pt] \tkzDrawY[above left,label=$R(m)$] \tkzLabelX[below right,font=\scriptsize] \tkzLabelY[font=\scriptsize] \tkzDefSetOfPoints{1/2000,2/3000,3/2000, 4/2500,5/4200} \tkzDefSetOfPoints[prefix=P]{1/3200,2/4100, 3/3300,4/3300,5/5000} \tkzSetUpMark[mark=heart,color=black, fill=red!30,size=4pt] \tkzJoinSetOfPoints[thick,color=blue,double] \tkzDrawSetOfPoints \tkzJoinSetOfPoints[prefix=P,thick,color=orange] \tkzDrawSetOfPoints[prefix=P,mark=square*, mark size=4pt, mark options={color=blue,fill=blue!40}] \tkzText[draw,color = red, fill = orange!20](3,5800)% {Recette en fonction du mois} \end{tikzpicture}