Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)  
C  0.025399   0.003941   6.445   0.0232 *
b -3.574200   0.564492  -6.332   0.0240 *
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.643 on 2 degrees of freedom

Number of iterations to convergence: 6 
Achieved convergence tolerance: 4.48e-06