Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)  
C  0.007493   0.001957   3.829   0.0314 *
b -3.844617   1.024479  -3.753   0.0331 *
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.9589 on 3 degrees of freedom

Number of iterations to convergence: 11 
Achieved convergence tolerance: 6.206e-06