Formula: dd ~ C * diam^b

Parameters:
  Estimate Std. Error t value Pr(>|t|)  
C  0.02856    0.00210   13.60   0.0467 *
b -3.75703    0.24897  -15.09   0.0421 *
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 0.2514 on 1 degrees of freedom

Number of iterations to convergence: 7 
Achieved convergence tolerance: 8.073e-07