A good data set to explore linear regression is analyzing the relationship between the number of spaces a property is from GO and the cost of that property (on a classic Monopoly board). This is actually a TI-Nspire activity which can be found on their website.
I don’t like their set up for three reasons. First, their worksheet gives students all the data in a pre-filled table. I think students are more invested in a problem if they do the “work” themselves to gather the data, even if it is just counting spaces from go.
Second, it ignores the utilities and the railroads which are good outliers.
Finally, I think this could be done by hand instead of on the calculator. Students could always compare their manual calculations with the calculator answer at the end if using the calculators is one of the objectives of this activity.
So I created this handout which is, as always, on a single page.