Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)  
C  0.018933   0.003506   5.401   0.0326 *
b -4.366677   0.745379  -5.858   0.0279 *
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.9049 on 2 degrees of freedom

Number of iterations to convergence: 8 
Achieved convergence tolerance: 1.643e-06