Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)  
C  0.009811   0.001793    5.47   0.1151  
b -5.795131   0.491302  -11.79   0.0538 .
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.4212 on 1 degrees of freedom

Number of iterations to convergence: 6 
Achieved convergence tolerance: 6.564e-06