Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)  
C  0.056715   0.007195   7.883   0.0157 *
b -3.447979   0.367059  -9.394   0.0111 *
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 1.266 on 2 degrees of freedom

Number of iterations to convergence: 6 
Achieved convergence tolerance: 2.607e-06