That Pesky Exponent - part the first

The mantra these days: if you're innumerate, you're a danger to society. Ronny VirusSeed^© is the number one idiot, with Wheelchair Greg a close second. Covid-δ is the top fuel dragster of disease, going from 0 to 300 mph in a quarter mile (not that they run that far anymore - too dangerous).

From today's news

Behind the country's latest surge is the Delta variant, which now accounts for more than 93% of coronavirus circulating in the US, according to data from the CDC. This includes several sub-lineages of Delta, all of which are classified as variants of concern. The number is even higher in parts of the country including Iowa, Kansas, Missouri and Nebraska, where Delta accounts for more than 98% of circulating virus.

Those numbers show a rapid increase in the variant's prevalence across the US. In late May, the CDC estimated that Delta made up about 3% of new Covid-19 cases.
[my emphasis]

That ain't linear.