Formula: dd ~ C * diam^b

Parameters:
  Estimate Std. Error t value Pr(>|t|)   
C  0.08806    0.01645   5.353  0.00588 **
b -4.43762    0.83174  -5.335  0.00594 **
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Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 

Residual standard error: 1.308 on 4 degrees of freedom

Number of iterations to convergence: 11 
Achieved convergence tolerance: 5.444e-06