18 setfontsize
-6 6 setxrange
-6 6 setyrange

/f {
   setxvar
  1 x div
} def

30 setxunit

[1 1 .5 .5 .1 .1] {orange} Quadrillage
tracerepere
marks
gsave
   bleu
   1.75 setlinewidth
   xmin -.01 {f} Courbe
   .01 xmax {f} Courbe
grestore

setTimesItalic
   (O) O drtext

<tex>
$$
   y = {1\over x}
$$
</tex>

/dx_boxit 2 def
/dy_boxit 2 def
/fillstyle {jaune fill} def
/linearc .05 def
boxit
-2 2 [2 dup] cctexlabel