Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)  
C  0.027233   0.003906   6.973   0.0907 .
b -2.196628   0.257565  -8.528   0.0743 .
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.5161 on 1 degrees of freedom

Number of iterations to convergence: 6 
Achieved convergence tolerance: 5.542e-06