true or false.
1.in y>x+2 the slope is one
2.(3,0) is a soulution of y<_x -1
3.in y > x+2 the plane divider ì a solid line
4.Every point above the line y=x + 3 is a solution of y > x - 3
5.(0,0) is not a solution of x-y<4
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