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HELP

function f(x) { y = 8.972*x + 20.939; return y }
...
aX = -0.2; bX = 1.2; aY = 18; bY = 32
Dx = 0.1; Dy = 1
...
yy=[20,25,30]; xx=[0.5,1]
Qx= [ 0, 0.30102999566398114, 0.6989700043360187, 1]
Qy= [ 21.1, 23.5, 27.0, 30.1 ]
Q1x=[Math.log10(7)]; Q1y=[f(Math.log10(7))]
C1="orange"
L1x=[Math.log10(7),Math.log10(7),-0.2]; L1y=[18,f(Math.log10(7)),f(Math.log10(7))]
...
...
AX=BX=AY=BY=""
BX="D"; BY="Log(A)"
...
AAX=aX; BBX=bX; AAY=aY; BBY=bY