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Student Response
1. C. Sample reasoning: The points in the scatter plot seem to follow the shape of a line best. The scatter plot in A is very spread out and the scatter plot in B is probably better t by a curve.
2.
Student Lesson Summary
Some data appear to have a linear relationship, so nding an equation for a line that ts the data can help you understand the relationship between the variables.
Other data may follow non-linear trends or not have an apparent trend at all.
When modeling data with a linear function seems useful, it is important to nd a linear function that is close to the data. The line should have a -intercept and slope to follow the shape of the data in the scatter plot as much as possible.
Unit 3
Lesson 5: Fitting Lines
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