We want a model of the form y = a(b)x, where x = 0 corresponds to the moment the video was released to the public.
- At x = 0 the number of views is a = 2,642.
- One day later (x = 1) the views are 3,963, so the daily growth factor is b = 3963 / 2642.
- Compute the ratio: 3963 ÷ 2642 = 1.5 = 3/2.
Therefore an exponential model is
y = 2642(3/2)x = 2642(1.5)x
(Here y is the total number of views x days after the video was released to the public.)