Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)  
C  0.032159   0.001743   18.45   0.0345 *
b -5.731246   0.342754  -16.72   0.0380 *
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.5355 on 1 degrees of freedom

Number of iterations to convergence: 5 
Achieved convergence tolerance: 6.065e-06