A population of flies, P, over a given amount of time, x, is modeled by the expression ​ P(1+r)xP(1+r)x ​ .

Note: r represents percentage rate as a decimal

What does each factor in the expression represent?

Select each correct answer.

P represents the initial amount of flies in the population

P represents the amount of flies at a given time

(1+r)(1+r) represents a growth of the fly population

​ (1+r)(1+r) ​ represents a decay of the fly population