Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)  
C  0.036416   0.006104   5.966   0.1057  
b -4.668110   0.547025  -8.534   0.0743 .
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.5612 on 1 degrees of freedom

Number of iterations to convergence: 8 
Achieved convergence tolerance: 1.152e-06