Cell phones: The following table shows the number, in millions, of cell phone subscribers in the United States at the end of the given year. a. Plot the natural logarithm of the data points. Does this...

Cell phones: The following table shows the number, in millions, of cell phone subscribers in the United States at the end of the given year.

a. Plot the natural logarithm of the data points. Does this plot make it look reasonable to approximate the original data with an exponential function?

b. Find the regression line for the natural logarithm of the data and add its graph to the plot in part a.

c. Construct an exponential model for the original subscribership data using the logarithm as a link.