The TI-89 graphing calculator makes a scatter plot in less time than it would take you to sharpen a pencil. Forget the wordy TI-89 manual: follow these show steps to enter your values into the Stats Editor, and press graph.
Sample problem: Create a scatter plot for the following coordinates (1,3), (2,4), (3,9), (4,11), and (5,12).
Step 1: Go into the Stats/List Editor. To get there, press Apps, scroll down to the Stats/List Editor, and press Enter. Note: If you are asked for a folder, the default is main. Just press Enter.
Step 2: Clear the List Editor. Press F1 and 8.
Step 3: Enter “SP” as the variable name by pressing Alpha 3 Alpha Sto.
Step 4: Enter your x-variables, one at a time. Follow each number by pressing the enter key. For our list, you would enter:
Step 5: Use the arrow keys to scroll across to the next column’s header (if you get stuck in a weird menu, press Esc. Enter the variable name SP2 by pressing Alpha 3 Alpha Sto 2.
Step 6: Enter your y-variables, one at a time. Follow each number by pressing the enter key. For our list, you would enter:
1 1 Enter
1 2 Enter
Step 7: Press F2 Enter F1. Make sure “Scatter” shows at the top. If it does not, use the right arrow to change it, then press Enter. Scroll down. Enter “SP” in the X box and “SP2″ in the Y box (using the same keystrokes as Steps 3 and 5. Press Enter Enter Enter ♦ F1 F2 9.
That’s it! That was easier than flipping through a TI-89 manual, wasn’t it?