Formula: dd ~ C * diam^b Parameters: Estimate Std. Error t value Pr(>|t|) C 0.036424 0.004033 9.032 0.000278 *** b -4.904055 0.421803 -11.626 8.27e-05 *** --- Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 Residual standard error: 0.7837 on 5 degrees of freedom Number of iterations to convergence: 8 Achieved convergence tolerance: 8.534e-06