Formula: dd ~ C * diam^b

Parameters:
  Estimate Std. Error t value Pr(>|t|)   
C  0.05562    0.01006   5.528  0.01167 * 
b -5.48533    0.62554  -8.769  0.00312 **
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 1.368 on 3 degrees of freedom

Number of iterations to convergence: 5 
Achieved convergence tolerance: 4.992e-06