-2.5 5 setxrange
-0.8 3 setyrange

1 setxyrapport
60 setxunit
7.5 setborder
90 setangle_repere
-0.7 4 setxrange
-0.7 3 setyrange
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
%ticks
%subticks
%marks
traceaxes
axesarrow

%unites
/f {setxvar
#rpn#   (7/10*x^2-41/20*x+37/20)
} def

/g {setxvar
#rpn#   5
} def


/M {0.5 0} def
/P {0.5 1} def
/N {3 0} def
/Q {3 2} def
/E {1.5 0} def
/F {1.5 0.35} def
/K {2.25 0} def
/L {2.25 0.78125} def
/S2 {P F milieu} def
/S3 {1.5 0.71041} def
/S4 {1.875 1.0328125} def

setTimesItalic
(O) O [1.8 dup] drtext
(x) 3.7 0 [1.8 dup] drtext
(y) 0 2.7 [1.8 dup] ultext

<latex>
$P_1$
</latex>
P [1.5 dup] cltexlabel

<latex>
$P_2$
</latex>
F [1.5 dup] dltexlabel

<latex>
$P_3$
</latex>
L [1.5 dup] crtexlabel

<latex>
$P_4$
</latex>
Q [1.5 dup] crtexlabel

gsave
pointilles
[M P] ligne
[N Q] ligne
[E F] ligne
[K L] ligne
grestore

[P F Q L S2 S3 S4] points
[P F] ligne
[S2 L] ligne
[S3 Q] ligne
gsave
   noir
   1 setlinewidth
   continu
0.15  3.5 {f} Courbe
grestore



<tex>
$x_1$
</tex>
M [1.8 dup] dctexlabel

<tex>
$x_2$
</tex>
E [1.8 dup] dctexlabel

<tex>
  $x_3$
</tex>
K [1.8 dup] dctexlabel

<tex>
  $x_4$
</tex>
N [1.8 dup] dctexlabel

<latex>
  $S_2$
</latex>
S2 [1.5 dup] uctexlabel

<latex>
  $S_3$
</latex>
S3 [1.5 dup] uctexlabel

<latex>
  $S_4$
</latex>
S4 [1.5 dup] uctexlabel

<latex>
$f$
</latex>
%boxit
3.4 2.8 [1.8 dup] dctexlabel

<latex>
$\rm{Abb}.\,12$
</latex>
-1.3 1.2 [2.0 dup] ultexlabel