Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)   
C  0.047627   0.009533   4.996  0.01543 * 
b -3.207111   0.415840  -7.712  0.00453 **
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 1.521 on 3 degrees of freedom

Number of iterations to convergence: 7 
Achieved convergence tolerance: 2.226e-06