Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)   
C  0.032844   0.001132   29.00  0.00119 **
b -3.743929   0.134895  -27.75  0.00130 **
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.1796 on 2 degrees of freedom

Number of iterations to convergence: 4 
Achieved convergence tolerance: 2.846e-06