\ANG{
Jede Gerade im dargestellten Koordinatensystem veranschaulicht
die L"osungsmenge einer linearen Gleichung mit zwei Variablen.
Gib die Gleichungen an!


\[ \beginpicture
\setcoordinatesystem units <1cm,1cm> 
\unitlength1cm
\thinlines
\setplotarea x from -5 to 5, y from -5 to 5
\setdots <3pt>
\grid {20} {20}
\setsolid
\thicklines
\put{\vector(0,1){10}} [Bl] at 0 -5
\put{\vector(1,0){10}} [Bl] at -5 0
\axis left shiftedto x=0 ticks in numbered from -4 to -1 by 1 
                                           from 1 to 4 by 1 /
\axis bottom shiftedto y=0 ticks in numbered from -4 to -1 by 1 
                                           from 1 to 4 by 1 /
\put{x} at 4.8 0.2
\put{y} at 0.2 4.8

\plot 1.5 -4.7 1.5 4.7 /
\put {g} at 1.7 -4.4

\plot -4.7 -3.5 4.7 -3.5 /
\put {h} at  4.4 -3.7 

\plot -3.7 -4.467 4.4 0.933 /
\put {m} at -1.5 -2.7

\plot -4.4 2.967 4.7 -0.067 /
\put {n} at -3.5 2.9

\endpicture \]

}
\LSG{
$g: \, x = 1,5$; $h: \, y = -3,5$; $n: \, y = - \frac{1}{3} x + 1,5$;
$m: \, y = \frac{2}{3} x - 2$
}
