Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)    
C  0.095630   0.006949   13.76 0.000830 ***
b -3.603344   0.191847  -18.78 0.000329 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.6564 on 3 degrees of freedom

Number of iterations to convergence: 6 
Achieved convergence tolerance: 8.678e-07