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x y -5 -19.5 -4 -16 -3 -12.5 -2 -9 -1 -5.5 0 -2 1 1.5 2 5 3 8.5 4 12 5 15.5 -6 -4 -2 0 2 -25 -20 -15 -10 -5 0 5 10 15 20 y
x y -5 -19.5 -4 -16 -3 -12.5 -2 -9 -1 -5.5 0 -2 1 1.5 2 5 3 8.5 4 12 5 15.5 -6 -4 -2 0 2 -25 -20 -15 -10 -5 0 5 10 15 20 y