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function f(x) { y = 0.01734*x + 16.90; return y } ... aX = 0; bX = 1500; aY = 0; bY = 45 Dx = 100; Dy = 5 ... Qx=[960,564,261,1227,284,89,705,168,431,104,1184,907,117,1048,284,1322,449,615,1479,143] Qy=[ 35, 27, 21, 36, 24, 17, 30, 19, 24, 18, 38, 32, 16, 36, 23, 40, 27, 31, 40, 18] xx=[500,1000,1500]; yy=[10,20,30,40] ... AX=BX=AY=BY="" BY="cm lunghezza"; BX="cm diam.tronco" ... AAX=aX; BBX=bX; AAY=aY; BBY=bY