Formula: dd ~ C * diam^b

Parameters:
    Estimate Std. Error t value Pr(>|t|)    
C  0.0120524  0.0001553   77.61 0.000166 ***
b -4.2620125  0.0583092  -73.09 0.000187 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.04972 on 2 degrees of freedom

Number of iterations to convergence: 4 
Achieved convergence tolerance: 1.802e-06