Analyzing Residuals (Part 1)

Just how far off is the least squares line? Using a graphing calculator, individuals or pairs create residual plots in order to determine how well a best fit line models data. Three examples walk through the calculator procedure of finding a residual plot. 

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Bring the lesson to your existing unit on scatter plots to augment the main concepts, or based your unit on the activity itself
  • Send home part of the assignment before or after your classroom instruction
Classroom Considerations
  • Requires graphing calculators
  • Uses the least-squares linear regression method, but any method of finding a line of best fit will work
  • Lesson 17 of a 20-lesson module
  • Exit ticket provided to determine understanding of the concept
  • Effective within the sequence of the module or within another unit on scatter plots and linear models
  • None