This exponential function y = 3(2)x + 4 represents the growth of a certain species of animal in a specific area. the y-axis represents the number of that animal present and the x-axis represents years. what can you say about the growth of the population of the species every year? a) the growth rate doubles each year. b) the growth rate triples each year. c) the growth rate increases by 2 each year. d) the growth rate increases by 5 each year.