Notes 
Finding a Regression and Medfit lines using a Graphing Calculator
By: Alicia Klaassen
This activity was the first time with finding regressions lines after using a paper/pencil method.
What I Did: I wanted to provide practice for the students to find regression lines in their graphing calculators. I went over the steps (very tedious work) of how to do the problem in the calculator. I did list the steps for the students, but we just went right to an example and bypassed the steps. I did spend a significant amount of time showing the students where all of the buttons were that they may need to use for this activity. We did a few examples as a class and then I had them work individually the rest of the period on the other problems. I found out that if the students work in groups on calculator activities, they remember or do the steps on their own as well.
What the Students Learned: The students had a good grasp on how to use the linreg option in their calculators. The students also began to learn about the correlation coefficient and what it means when finding a regression line.
What I Would Change Next Time: I think that this would be a good activity in following instructions. I think that I would like to see what the students would get out of it by simply following the directions step by step. I will also be extending this activity for when we begin to discuss quadratic, cubic, and quartic regressions in another class.
