100 PROGRAM "MapRange.bas"
110 LET A1=0:LET A2=10
120 LET B1=-1:LET B2=0
130 DEF MR(S)=B1+(S-A1)*(B2-B1)/(A2-A1)
140 FOR I=0 TO 10
150   PRINT I;"maps to ";MR(I)
160 NEXT