Unit 6 - Lesson 5 - Grade 8: Illustrative Mathematics

Which one doesn’t belong?

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In your own words, describe what makes a line fit a data set well.

For how many cars does the model in Diagram A make a good prediction of its price?

For how many cars does the model underestimate the price?

For how many cars does it overestimate the price?

For how many cars does the model in Diagram B make a good prediction of its price?

For how many cars does the model underestimate the price?

For how many cars does it overestimate the price?

For how many cars does the prediction made by the model in Diagram A differ by more than $3,000? What about the model in Diagram B?

Which model does a better job of predicting the price of a used car from its year?