Graphics
Model: y = f(x;beta) + e  =  (beta(1) + beta(2)x + beta(3)x^2 + beta(4)x^3) / (1 + beta(5)x + beta(6)x^2 + beta(7)x^3) + e

Fitted and Observed Values
versus
Predictor Variable


Fitted and Observed Values vs. Predictor Variable
Residuals
versus
Predictor Variable


Residuals vs. Predictor Variable