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\begin{tikzpicture} \tkzInit[xmax=6,ymin=1000, ymax=5000,ystep=1000] \tkzAxeXY \tkzDefSetOfPoints[prefix=P]{% 1/2000, 2/3000, 4/2500, 5/4200} \tkzDrawSegments[color=Maroon!50]% (P1,P2 P2,P3 P3,P4) \tkzDrawMarks[mark=ball](P1,P2,P3,P4) \end{tikzpicture}