Chapter 1.2, Problem 78E

Group members should begin by consulting an almanac, newspaper, magazine, or the Internet to find two graphs that show “intriguing” data changing from to year. In one graph, the data values should be increasing relatively steadily. In the second graph, the data values should be decreasing relatively steadily. For each graph selected, write a mathematical model that estimates the changing variable x years after the graph’s starting date. Then use each mathematical model to make starting date. Then use each mathematical model to make predictions about what might occur in the future. Are there circumstances that might affect the accuracy of the prediction? List some of these circumstances.