# Which Model Makes Sense?

### Resources for this lesson:

You will use your Algebra II Journal on this page.

> Glossary

> Calculator Resources

> Teacher Resources: Instructional Notes

## Algebra II Journal: Reflection 3

Respond to the following in your Algebra II Journal . Submit your response to your

teacher.

Examine the following data set:

Andrew’s parents want to buy him a car for his birthday. They have been investigating the Blue Book values of cars to determine which car will have the best resale value in 10 years. They have gathered the following information on one car:

**Car Resale Value (2007 Model) **

Year |
2007 |
2008 |
2009 |
2010 |
2011 |
2012 |
---|---|---|---|---|---|---|

Resale Value (in dollars) |
14,500 |
12,600 |
11,000 |
9,400 |
8,350 |
7,200 |

Analyze the data set and determine the model of best fit. If you selected a linear model, be sure to also analyze the correlation coefficient. Justify why the model you selected is the best fit.

Once you have a model of best fit, use the model to estimate the resale value of the car in 2018.