Comments

Presentation

Good job guys! the page is very easy to read and well organized. A small suggestion for the future: use section headers instead of just bold text to separate your sections!

Math Contents

Excellent job in understanding and providing all the different kinds of models! A step forward in the future would be to try to prove the trend of the marginal cost using algebraic math. For example for a linear problem where $y(x)=mx+b$, using the average formula $average={\frac {\Delta y}{\Delta x}}$ , we can get $average={\frac {m*\Delta x+b}{\Delta x}}$, then see what happens with large $\Delta x$.

Other Comments

Good explanation for economies of scale, and good job at finding other models that are interesting!