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function f(x) { y = -6.9e-05*x*x*x + 0.00482*x*x + -0.115*x + 0.998; return y } aX = 0; bX = 30; aY = 0; bY = 1.1 Dx = 5; Dy = 0.1 Q1x=[0, 1, 2, 4, 6, 8, 10, 15, 20, 30] Q1y=[1,0.886,0.785,0.608,0.465,0.35,0.26,0.115,0.069,0.012] AX=BX=AY=BY="" AAX=aX; BBX=bX; AAY=aY; BBY=bY