Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)    
C  0.043561   0.004583   9.504 0.000684 ***
b -3.536340   0.360015  -9.823 0.000602 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.9073 on 4 degrees of freedom

Number of iterations to convergence: 11 
Achieved convergence tolerance: 4.937e-06