[ 0 100 -0.6 1.6 ] Axe2 [ (0) (25) (50) (75) (100) ] GradX [ (-0.50) (0) (0.50) (1.00) (1.50) ] GradY [ 10 -0.3 20 0.15 30 0.25 40 0.40 60 0.65 80 0.73 ] Plot