Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)   
C  0.059173   0.009481   6.241   0.0083 **
b -5.129171   1.146982  -4.472   0.0208 * 
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 1.153 on 3 degrees of freedom

Number of iterations to convergence: 20 
Achieved convergence tolerance: 9.597e-06