Formula: dd ~ C * diam^b

Parameters:
  Estimate Std. Error t value Pr(>|t|)
C  0.01628    0.01104   1.475    0.278
b -4.69547    2.15955  -2.174    0.162

Residual standard error: 2.169 on 2 degrees of freedom

Number of iterations to convergence: 11 
Achieved convergence tolerance: 8.343e-06 
  (1 observation deleted due to missingness)