y =

    5.0291
    6.5099
    5.3666
    4.1272
    4.2948
    6.1261
   12.5140
   10.0502
    9.1614
    7.5677
    7.2920
   10.0357
   11.0708
   13.4045
   12.8415
   11.9666
   11.0765
   11.7774
   14.5701
   17.0440
   17.0398
   15.9069
   15.4850
   15.5112
   17.6572


linear fit =

    4.5453
    5.0779
    5.6105
    6.1431
    6.6757
    7.2083
    7.7409
    8.2735
    8.8061
    9.3387
    9.8713
   10.4039
   10.9365
   11.4691
   12.0017
   12.5343
   13.0669
   13.5995
   14.1321
   14.6647
   15.1973
   15.7299
   16.2625
   16.7951
   17.3277