Formula: dd ~ C * diam^b

Parameters:
   Estimate Std. Error t value Pr(>|t|)
C  0.008495   0.003325   2.555    0.238
b -1.522500   1.462337  -1.041    0.487

Residual standard error: 1.081 on 1 degrees of freedom

Number of iterations to convergence: 7 
Achieved convergence tolerance: 9.079e-07