if t = 0, this would indicate that no time has passed and therefore no visitors have since visited the website. (10,600 • 2(0) = 0)
if t = -2, this would indicate that this is how many visitors there were in comparison to 2 months ago, which is why the number is negative to indicate that there were less visitors two months prior compared to now (10,600 • 2(-2) = -42,400)