Using Core Math Tools to Determine the Line of Best Fit

Karla Goldhahn

Where can you download Core Math Tools?

Download the free software here: http://www.wmich.edu/cpmp/CPMP-Tools/

Demonstration:

Step 1: Open Spreadsheet

Step 2: Enter the data

Column A: input valuesColumn B: output values

For this example, I used the data from the Building and Combining functions task. Column A represents number of years since 2000; column B represents the crime rate for City A.

Step 3: Graph the Data1. Go to: Tools,Graph,Scatterplot

2. Designate the input values (horizontal) and output values (vertical)

For this example, Column A, number of years since 2000, is my input/horizontal and Column B, crime rate for City A, is my output/vertical

Step 4: Draw Regression Models1. Go to: Options,Draw Regression Model

2. There you have it, the equation for theline of best fit!

For questions or to provide feedback, please email me at Karla.Goldhahn@henry.k12.ga.us