(2,3) (-3,1) (-1.5, -2.5)
( 2.5, 0.5) ( 3, 1.25) (1.5, 1.75) (0, 1.25) (0,0)
(4, 5) (2.5, 4) (1.5, 2.5)
(-5,3) (6,5) (4.5, -3.5) (0.0)
