In the following data, x is the diameter of a ponderosa pine in inches measured at breast height and y is a measure of volume—number of board feet divided by 10. Test the model y = ax^b by plotting the transformed data. If the model seems reasonable, estimate the parameters a and b of the model graphically.

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x | 17 19 A 19 20 22 23 25 28 31 32 25 32 51 57 71 113 141 123 5 | 33 36 37 38 39 41 187 192 205 252 259 294