Lesson plan

7. Interpret the slope and intercept of a line of best fit (FP)

teaches Common Core State Standards CCSS.Math.Content.8.SP.A.2 http://corestandards.org/Math/Content/8/SP/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
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Lesson objective: Fluently interpret the slope and intercept of a line of best fit for a scatter plot in the context of the independent and dependent variables.

This lesson helps to build fluency with interpreting the slope and intercept of a line of best fit. A line of best is used here because it highlights the slope and intercept of a linear model. This work develops students' understanding that bivariate data may not have an exact linear association, but a linear model is often used to describe the association.

Students engage in Mathematical Practice 5 (Use appropriate tools strategically) as they interpret the slope and intercept of a line of best fit.

Key vocabulary:

  • bivariate data
  • dependent variable
  • independent variable
  • intercept
  • line of best fit
  • rate of change
  • slope
  • y-intercept

 

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