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function f(x) { y =  4.891*x + 8.5  ; return y }
...
aX = 0; bX = 110; aY = 0; bY = 550
Dx = 10; Dy = 50
...
Qx = [87, 35, 98, 57, 73, 8, 78, 40, 22]
Qy = [432,143,488,303,322,62,422,241,99]
xx =[50,100]; yy = [100,200,300,400,500]
...
AX=BX=AY=BY=""
...
AAX=aX; BBX=bX; AAY=aY; BBY=bY