20 setfontsize
4 setxyrapport
113.386 setxunit
7.5 setborder
90 setangle_repere
-0.25 4 setxrange
-1 23 setyrange
1 1 settkstep
.25 0.5 setsubtkstep
1 1 setmkstep
ticks
xsubticks
marks
traceaxes
axesarrow
/f {setxvar
#rpn#   -5*x^2+10*x+15
} def
gsave
   bleu
   1 setlinewidth
   continu
 0 3  {f} Courbe
grestore

<latex>
\begin{center}temps écoulé\\(en s)\end{center}
</latex>
boxit
4 0.5 [1.5 1.5] ultexlabel

<latex>
\begin{center}hauteur de \\la balle (en m)\end{center}
</latex>
boxit
0.125 22 [1.5 dup] crtexlabel

0 15 point
0.5 18.8 point
0.75 19.7 point 
1 20 point
1.25 19.75 point
1.5 18.8 point
2 15 point
2.5 8.8 point
3 0 point

/quadrillagegray 0.3 def
0.25 setquadrillagexstep
1 setquadrillageystep
quadrillage