Kirill Z. answered 07/24/13
Physics, math tutor with great knowledge and teaching skills
You are given -2x-y>=-8 Rewrite it as y<=-2x+8 (Move y to the right and -8 to the left). Then the boundary line is straight line given by the equation y=-2x+8 and the region corresponding to the solution is underneath this straight line, that is below the boundary line.