The media regularly refers to "exponential" growth in the number of cases of COVID-19 respiratory disease, and deaths from the disease, but the numbers suggest something else, a "small world ...

With exponential growth, the number of new cases each day constantly increases—graph the total over time, and you’ll see that the line curves upward—and that can get you into big numbers ...

“The graph that really grabbed my attention was the one showing a model of daily new cases of Covid-19 with social-distancing measures starting just one day apart,” Dr. Britta Jewell said.

Watch this video to learn about straight line graphs of logarithmic and exponential functions. To play this video you need to enable JavaScript in your browser. This video can not be played ...