this data set has 7 columns

y = oxygen consumption in vol/body wt/unit time
x1 = age in years
x2 = weight in kilograms
x3 = time to run 1.5 miles
x4 = resting pulse rate
x5 = pulse rate at end of run
x6 = max pulse rate during run


  44.6  44  89.5  11.4  62  178  182
  45.3  40  75.1  10.1  62  185  185
  54.3  44  85.8   8.7  45  156  168
  59.6  42  68.2   8.2  40  166  172
  49.9  38  89.0   9.2  55  178  180
  44.8  47  77.5  11.6  58  176  176
  45.7  40  76.0  12.0  70  176  180
  49.1  43  81.2  10.9  64  162  170
  39.4  44  81.4  13.1  63  174  176
  60.1  38  81.9   8.6  48  170  186
  50.5  44  73.0  10.1  45  168  168
  37.4  45  87.7  14.0  56  186  192
  44.8  45  66.5  11.1  51  176  176
  47.3  47  79.2  10.6  47  162  164
  51.9  54  83.1  10.3  50  166  170
  49.2  49  81.4   9.0  44  180  185
  40.8  51  69.6  11.0  57  168  172
  46.7  51  77.9  10.0  48  162  168
  46.8  48  91.6  10.3  48  162  164
  50.4  49  73.4  10.1  76  168  168
  39.4  57  73.4  12.6  58  174  176
  46.1  54  79.4  11.2  62  156  165
  45.4  52  76.3   9.6  48  164  166
  54.6  50  70.9   8.9  48  146  155
  45.1  51  67.3  11.1  48  172  172
  39.2  54  91.6  12.9  44  168  172
  46.0  51  73.7  10.5  59  186  188
  50.5  57  59.1   9.9  49  148  155
  48.7  49  76.3   9.4  56  186  188
  47.9  48  61.2  11.5  52  170  176
  47.5  52  82.8  10.5  53  170  172