%% auteur : gh

60 setxunit
-0.5 5 setxrange
-0.5 5 setyrange

traceaxes
axesarrow
1.7 setlinewidth

/O {0 0} def
16 setfontsize
setTimesItalic
   (O) O dltext
/f {setxvar x 0.75 mul 1 add 0.4 x div sub} def
/g {setxvar x 0.75 mul 1 add} def


bleu
0.3 5 {f} Courbe

<tex>
$$ \Gamma $$
</tex>
0.7 1 [1.5 1.5] drtexlabel

<tex>
$$ t\to t_0 $$
</tex>
4.2 4.2 f [1.5 1.5] drtexlabel

1 setlinewidth
rouge
-0.3 7 {g} Courbe

<tex>
$$ y=ax+b $$
</tex>
4.2 4.2 g [1.5 1.5] ultexlabel