Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)    
C  0.023054   0.004679   4.927 0.007892 ** 
b -5.278545   0.583447  -9.047 0.000827 ***
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 1.128 on 4 degrees of freedom

Number of iterations to convergence: 8 
Achieved convergence tolerance: 8.939e-06