Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)
C  0.023104   0.004733   4.881    0.129
b -4.413490   1.203082  -3.668    0.169

Residual standard error: 0.9597 on 1 degrees of freedom

Number of iterations to convergence: 7 
Achieved convergence tolerance: 1.747e-06