(Medicare). The annual expenditures for Medicare (in billions of dollars) by the US Government for selected years since 1980 are shown in Table 4. Let x represent the years since XXXXXXXXXXUse 4...

(Medicare). The annual expenditures for Medicare (in billions of dollars) by the US Government for selected years since 1980 are shown in Table 4. Letx represent the years since 1980. (Use 4 decimal places in all answers.)
Table 4: Medicare Expenditures

A. Find the exponential regression model for the data.

M(x) =

B. What is ther
² value for this model?

r
² =

C. Extimate (to the nearest billion) the expenditures in 2008?
The Medicare expenditures in 2008 were about $

 billion.