purchasing power and inflation

For your data set, use Excel to graph the purchasing power data you selected in Part I and find three models with the input being the number of years since 1910 and the output being the purchasing power. You must find a (a) linear model, (b) Polynomial model of any order (whatever you want), and (c) an exponential or logarithmic model (again your choice – choose what looks best).
Explain which model is most accurate for each data set (re-watch my Accuracy of Models video if you need the review.) Be sure to copy all scatterplots with the regression model and equation (Just literally CTRL C the graph and it should paste right into your word processor.)