If we assume that china is an infinite plain, with Chinese people distributed uniformly across it, and that individual Chinese people don’t travel much, then R2 could be accurate. A circle of disease spreading at a constant distance per day.
Nit: I guess you mean “a quadratic model could be accurate”. The term R² here has nothing to do with the fact that the model is quadratic.
If we assume that china is an infinite plain, with Chinese people distributed uniformly across it, and that individual Chinese people don’t travel much, then R2 could be accurate. A circle of disease spreading at a constant distance per day.
Nit: I guess you mean “a quadratic model could be accurate”. The term R² here has nothing to do with the fact that the model is quadratic.