(0,4) : not a solution (-2,4) ; solution (0,5) : solution (-2,7) : solution (-4,1) : not a solution (-1,1) : not a solution (-1.5,3.5) : solution
any point that falls in the grey area is a solution....if ur points lie on a dashed line, it is not a solution...but if ur points lie on a solid line, it is a solution
