Answer:
This is an example of Extrapolation
Step-by-step explanation:
Extrapolation is the forecasting of the future based on assumption that present or past trends will continue.
It also assumes the method used for estimating past trends will still be used in future.
For example forecasts of world population.
In this instance, there were 48 impersonators of Elvis Presley, presently it has increased to to 7,328. Estimating that in 2016 based on the present trend, that one of four people will be an Elvis Presley impersonator, is also an example Extrapolation.