Semi-log plots and exponential growth, from correlation to causation with COVID19!

My cautionary tale and tutorial provides a series of plots of COVID19 data, illustrating linear and log scales, together with the pitfalls of causal inference, and includes occasional questions to facilitate understanding. It’s now graced by the addition of this figure:

🤣

I created the tutorial for my students but it assumes no knowledge, so it’s useful for others, and Roberto de Pinho has translated it into Portuguese.