X1 = Body weight
  X2 = Liver weight
  X3 = Dose
  Y  = percentage of the dose in the liver  


X1    X2    X3   Y   

176  6.5  .88  .42 
176  9.5  .88  .25
190  9.0 1.00  .56
176  8.9  .88  .23
200  7.2 1.00  .23
167  8.9  .83  .32
188  8.0  .94  .37
195 10.0  .98  .41
176  8.0  .88  .33
165  7.9  .84  .38
158  6.9  .80  .27
148  7.3  .74  .36
149  5.2  .75  .21
163  8.4  .81  .28
170  7.2  .85  .34
186  6.8  .94  .28
146  7.3  .73  .30
181  9.0  .90  .37
149  6.4  .75  .46