TI-89

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Setting up a scatterplot

From the home screen press the APPS key to get the Applications Screen

Select choice 6 for Data/Matrix Editor

If this is your first time for the activity you will want to then select choice 3. New

For this example keep the

Type as data

and the

Folder as Main

Type in the Variable the name for your data.  In this case we will use Pop for Population

When you entered the name press Enter twice to get to the next screen

Enter the data in the columns labeled c1 and c2.
Year Population in Millions
1986 4936
1987 5023
1988 5111
1989 5201
1990 5329
1991 5422

To set up the scatterplot select Plot Setup (F2)

You should notice that none of the plots have been defined.  To define the plot put the cursor on the plot number you want and the select F1 (Define)

The first thing you will want to select is the Plot Type.  Since we are doing a scatterplot, we don't have to change the first category. 

The next step would be to pick the type of mark to use to make the scatterplot.  The Box is a good choice, so skip this category.

We need to then enter c1 for the x values and c2 for the y values. 

Press Enter Twice to return to the data. 

The next step would be to select an appropriate window for the data.

Press WINDOW.

 In this case the window at the right would be appropriate.

We are now ready to look at a scatterplot.  Press GRAPH.

How to fit a regression line to this data.

 

 

© Rahn 2000