The population of a small town is 500 people. Based on growth of the population in past years, it is estimated that after 1 year the population will be 600 people. Similarly, it is estimated that after 2 and 3 years, the population will be 720 and 864 people, respectively. Which function describes the relationship between year and town population. a. f(x) = 500(1.2)^x
b. f(x) = 500(1.2)^x-1
c. f(x) = 500(0.2)^x-1
d. f(x) = 500(0.2)^x