Graphing and Linear Regression
Use the “Add Another Data Point" and “Delete Last Data Point" buttons to add to/subtract from the number of data points.
Press the "Plot Data" button at any time to see your data on the graph. When you are ready, press the "Best-Fit Line" button to plot the best-fit line for your data.
Check the "Exclude Data" box for any suspect data point(s) and then press the “Best-Fit Line" button to see how excluding data affects your best-fit line.