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HELP

function f(x) { y = 1/0; return y }

aX = 8+30/60; bX = 9+10/60; aY = 0; bY = 26
Dx = 1/60; Dy = 1

C1="brown"
Px = [8+32/60,8+36/60,8+43/60,8+47/60,8+51/60,8+55/60,8+59/60,9+4/60,9+10/60]
Py = [126,   130,    137,    140,    142,    145,    146,    148,    151]
for(i=0;i<9;i=i+1) {Py[i]=Py[i]-126}
L1x=Px; L1y=Py
xx=[8+3/6,8+4/6,8+5/6,9,9+1/6]; yy=[5,10,15,20,25]

AX = ""; BX = "km percorsi"; AY = ""; BY = "ora"
linew=3
T0=["8:30",8+1/2,-1]; T1=["8:40",8+4/6,-1]; T2=["8:50",8+5/6,-1]; T3=["9:00",9,-1]; T4=["9:10",9+1/6,-1]
T5=["5",8.48,5]; T6=["10",8.48,10]; T7=["15",8.48,15]; T8=["20",8.48,20]; T9=["25",8.48,25]