The Importance of Fermi Estimation

If the growth rate starts to increase above 5% a day, then you would clearly perceive that because the line is no longer straight. Or if on the other hand, it started to flatten off and there might be many reasons. You get very early visual warning of that on a logarithmic graph because, hang on, it's not straight anymore. It's below the straight line. Yes, absolutely. And exponential growth to some extent is a sort of toy model. It's not something that goes on forever. If we did keep growing at 5% forever, then the entire population of the world would be infected multiple times over. In a short period of time. So clearly