Building a wire frame model
This illustrates the first example in section
6.2 Wire Frames, Partial Derivatives, and Tangent Planes
in Business Calculus with Excel
We have been given the function
Revenue(QG, QW) =10QG - QG^2/50 + 20QW -QW^2/40
As the revenue function for a business that makes Gizmos and Widgets.
We want to see how the surfqace can be modeled by a wire frame constructed by knowing functions in one variabel