A population has size 25 at time t = 0, with t measured in years. (a) if the population decreases by 4 people per year, find a function for the population size, p, at time t. enter your answer as an equation with p on the left side, and an expression involving t on the right

First we define the variables:

p = population

t: time in years

The equation that best fits this problem is a linear equation of the form:

p = - 4t + 25

Note that for t = 0 the value of p is 25, which represents the initial population.

Answer:

a function for the population size, p, at time t is:

p = - 4t + 25