A biologist study the graph of two different trees over five year period. At the beginning of the study she measured each trees diameter. The biologist took the same measurement eatyou to determine the growth. The red maple in her study had a starting diameter of 4 inches. The diameter girl at an average rate of 0.3 inches per year. The graph on the right shows the growth rate of the silver maple. Which function has a greater rate of change?