The line graph shows the cost of inflation in some country. What cost $100 in 1999 would cost the amount shown by the graph in subsequent years. Below are two mathematical models for the data shown in the graph. In each formula, C represents the cost x years after 2010 of what cost $100 in 1999. Answer parts (a) through (c). Model 1 Cequals1.9xplus120.5 Model 2 Cequals0.03x squaredplus1.7xplus120.7