I've been asking people this math puzzle as an intro to this topic:
Suppose you have a pond that covers over with lily pads every spring. The lily pads double every day. It takes 16 days for the pond to be completely covered. How long does it take to be half covered?
The answer, of course, is 15 days, which seems very counter-intuitive. But that's what exponential growth is like: nothing, nothing, nothing, nothing, FOOM!
So, now, imagine your hospital beds are 75% empty, and the case rate is doubling every 3.5 days. What's it going to look like in a week and a half?
That's why it's so important to slam on the brakes hard when you see that exponential growth.
There are no data that cannot be plotted on a straight line if the axis are chosen correctly.