Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)  
C  0.026860   0.007421   3.620   0.0686 .
b -2.977516   0.787970  -3.779   0.0634 .
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 1.005 on 2 degrees of freedom

Number of iterations to convergence: 16 
Achieved convergence tolerance: 5.655e-06