se the exponential growth function that fits the given data, then answer the accompanying question. Be su ify the reference point (t=0) and units of time. population of a town with a 2009 population of 86,000 grows at a rate of 1.9% per year. In what year will the ulation double its initial value (to 172,000)? at is the reference point (t = 0)? A the initial population, 86,000 1 8. the doubled population, 172,000 C. the rate, 1.9% D. the year 2009 hat are the units of time? A years B. decades C. percent DD. people Write the exponential growth function. -