28.4527 setxunit %% 10 mm
%40 setxunit
-2 5 setxrange
-1 3 setyrange

%[1 1 .5 .5 .1 .1] {orange} Quadrillage

traceaxes
axesarrow
/A {2 0} def
/B {0 1} def

[A B] points
A B droite