
Concept explainers
All of the following exercises can be done with a graphing calculator if your instructor so directs. The calculator can also be used to check your work.
Football ticket prices. Ticket prices for NFL football game have experienced steady growth, as shown in the table below.
Number of years, x, since 2009 | Average Ticket Price (dollars) |
0 | $73.18 |
1 | 76.47 |
2 | 77.36 |
3 | 79.09 |
4 | 81.54 |
a. Find the regression line,
b. Use the regression line to predict the average ticket price for an NFL game in 2020 and 2025.

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