 \begin{tikzpicture}
   \tkzSetUpPoint[shape = cross out,
                     color=blue]
   \tkzInit[xmax=100,xstep=20,ymax=.5]
   \tkzDefPoint(20,1){A}
   \tkzDefPoint(80,0){B}
   \tkzDrawLine(A,B)
   \tkzDrawPoints(A,B)
\end{tikzpicture}
