Question 941613
{{{ graph( 500, 500, -10, 10, -10, 10, -x-1, 2x-4) }}}
The two lines intersect at the point (1,-2).
You can check by plugging in to each equation
y=-x-1
-2=-1-1
-2=-2
and 
y=2x-4
-2=2-4
-2=-2