Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)  
C  0.035229   0.006841   5.150   0.0357 *
b -3.117688   0.447002  -6.975   0.0199 *
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 1.036 on 2 degrees of freedom

Number of iterations to convergence: 5 
Achieved convergence tolerance: 3.935e-06