Question 69655
x-2y<5 
x-x-2y<-x5 [solve for y]
-2y<-x+5
-2y/-2>-x/-2+5/-2
y>1/2x-5/2 [switch the sign when dividing or multiplying by a negative number]
.
Draw a dashed line (instead of the solid line shown).  Shade everything above the line.
{{{ graph( 300, 200, -6, 15, -5, 10,  (1/2)x-(5/2)) }}}