The equation p = 5,000 · 2' represents the population of an invasive fish species in a large lake, 7 years since 2005, when the fish population in the lake was first surveyed.
1. What was the population in 2005?
2. For this model, whatſdoes it mean when t is -2?
3. For t = -2, is the fish population more or less than 1,000? How do you know?