Question
The following table shows retail sales in drug stores in billions of dollars in the U.S....
The following table shows retail sales in drug stores in
billions of dollars in the U.S. for years since 1995.
| Year | Retail Sales |
|---|---|
| 0 | 85.851 |
| 3 | 108.426 |
| 6 | 141.781 |
| 9 | 169.256 |
| 12 | 202.297 |
| 15 | 222.266 |
Let S(t)S(t) be the retails sales in billions of dollars in t years
since 1995. A linear model for the data is
F(t)=9.44t+84.182F(t)=9.44t+84.182.
36912158090100110120130140150160170180190200210220
Use the above scatter plot to decide whether the linear model fits
the data well.
- The function is a good model for the data.
- The function is not a good model for the data
Estimate the retails sales in the U. S. in
2017. billions of dollars.
Use the model to predict the year that corresponds to retails sales
of $238 billion.
Homework Answers
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