> This is Basic 101 microeconomics Interesting. I've only read one intro to microeconomics book, but I remember it having a hand-waved graph with a clear peak

> This is Basic 101 microeconomics Interesting. I've only read one intro to microeconomics book, but I remember it having a hand-waved graph with a clear peak on some unspecified point. And an explanation that the peak's position depends on a lot of factors.