-4.5 4 setxrange
-0.5 1.2 setyrange
50 setxunit
50 setyunit
7.5 setborder
90 setangle_repere
-2 4 setxrange
-0.5 1.1 setyrange

traceaxes 
axesarrow 
setTimesItalic
(x) 4.05 0 [1.8 dup] drtext
(y) 0 3 [1.8 dup] ultext


/A {-1.2 0} def
/B {0.8 0} def
/C {3 0} def

-1.2 xtick
0.8 xtick
3 xtick


<latex>
$A(a_1,0) $
</latex>
A [1.5 dup] uctexlabel

<latex>
$ B(b_1,0) $
</latex>
B [1.5 dup] uctexlabel

<latex>
$ C(c_1,0) $
</latex>
C [1.5 dup] uctexlabel

<latex>
$\rm{Abb}.\,1$
</latex>
-3 0 [2.0 dup] ultexlabel

<latex>
$ x $
</latex>
4 0 [1.5 dup] dltexlabel

<latex>
$ y $
</latex>
0 1.05 [1.5 dup] dltexlabel