Formula: dd ~ C * diam^b

Parameters:
  Estimate Std. Error t value Pr(>|t|)  
C  0.08259    0.01162   7.106   0.0192 *
b -4.63484    0.75874  -6.109   0.0258 *
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 1.034 on 2 degrees of freedom

Number of iterations to convergence: 8 
Achieved convergence tolerance: 4.267e-06