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I wrote this for our high school algebra one students. Students will need technology (a graphing calculator with the "STAT" feature will be sufficient) to perform the 16 linear regressions. Students should be familiar with vocabulary such as correlation, relationship, causation, extrapolation, interpolation, linear, non-linear, prediction, correlation coefficient, though in all honesty, the circuit leads them through these ideas.
There is no answer key included since the answers are part of the circuit; it is how students advance from one question to the next. The only thing the teacher needs to do is work the circuit ahead of the students to decide how to best use it in the classroom. The students and the circuit will take care of the rest!
Teachers, should you get stuck or suspect there is an error, please email me at email@example.com should you get stuck and I will help you.