25 setxunit
7.5 setborder
90 setangle_repere
0 10 setxrange
0 20000 setyrange
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
unites
/f {setxvar
#rpn# – 0,4x² + 6,4x – 0,8
} def
gsave
bleu
.75 setlinewidth
continu
10 10 {f} Courbe
grestore
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