(Solved): The line graph shows the cost of inflation in some country. What cost $100 in 1999 would cost the a ...

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 $1\mathrm{C}=1.9\mathrm{x}+125.5$ Model $2\mathrm{C}=0.03{\mathrm{x}}^2+1.8\mathrm{x}+125.6$ a. Use the graph to estimate the cost in 2018 of what cost $\$100$ in 1999. $\$140$ b. Use model 1 to determine the cost in 2018. How well does this describe your estimate from part (a)? The cost in 2018 was approximately $\$$ (Round to the nearest dollar as needed.)