Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)    
C  0.060836   0.005948   10.23 0.000515 ***
b -4.329348   0.343384  -12.61 0.000228 ***
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 1.315 on 4 degrees of freedom

Number of iterations to convergence: 4 
Achieved convergence tolerance: 3.177e-06