Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)   
C  0.022270   0.001787   12.46  0.00637 **
b -3.827280   0.290323  -13.18  0.00570 **
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.3226 on 2 degrees of freedom

Number of iterations to convergence: 5 
Achieved convergence tolerance: 1.452e-06