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Regression
Place in mathematics curriculum:
This activity can be used to:
- Teach students about how data influences the line of best fit.
- Provide students with practice in determining the line of best fit for some data.
- Introduce students to residuals.
- Allow students exploration with the linear correlation coefficient, r.
The regression applet is designed to allow the user to plot a bivariate data set, determine the line of best fit for their data, and then check the accuracy of their line of best fit. This activity determines the correlation coefficient, r, for the true lines of best fit and also exposes students to residuals. This activity would work well in groups of two or three for about 10-15 minutes.
Preparations for this activity:
Explain:
- correlation.
- residuals.
- how to interpret the residual table and plot
- the linear correlation coefficient, r.
- independent and dependent variables.
