Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)   
C  0.025793   0.003012   8.563  0.01336 * 
b -5.030335   0.347999 -14.455  0.00475 **
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.4826 on 2 degrees of freedom

Number of iterations to convergence: 7 
Achieved convergence tolerance: 2.374e-06