Formula: dd ~ C * diam^b

Parameters:
  Estimate Std. Error t value Pr(>|t|)
C  0.03724    0.01437   2.592    0.234
b -2.65620    0.58855  -4.513    0.139

Residual standard error: 1.651 on 1 degrees of freedom

Number of iterations to convergence: 7 
Achieved convergence tolerance: 4.934e-06