Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)    
C  0.017132   0.001256   13.64 0.000852 ***
b -4.472315   0.245970  -18.18 0.000363 ***
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.9286 on 3 degrees of freedom

Number of iterations to convergence: 6 
Achieved convergence tolerance: 4.682e-06