Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)    
C  0.040429   0.002432   16.62 0.000474 ***
b -3.551792   0.161386  -22.01 0.000205 ***
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.4704 on 3 degrees of freedom

Number of iterations to convergence: 7 
Achieved convergence tolerance: 6.527e-07