Graph Several Sequences on the TI-83 Plus

Even if you’ve put the TI-83 Plus calculator in the Sequential mode for graphing functions, it’s going to graph all sequences simultaneously. So you can’t tell the sequences apart simply by looking at the order in which they’re graphed.

To identify the graphs of several sequences, set a different graph style for each sequence:

  1. Press [Y=] to access the Y= editor.

  2. Use the

    image0.png

    keys to place the cursor on the icon appearing at the very left of the definition of the sequence.

  3. Repeatedly press [ENTER] until you get the desired graph style.

    When the calculator graphs the discrete points in a scatter plot, it gives you a choice of graphing them as dots, little plus signs, or small squares. It’s a shame that you don’t get the same choices when graphing the discrete points in a sequence. Unfortunately, the graphing styles for sequences are Dotted Line, Line, and Thick Line. (Go figure!)

    Each time you press [ENTER], you get a different style.

If you don’t want the calculator to graph one of your sequences, un-highlight its equal sign. To graph it at a later time, rehighlight its equal sign. You can do so in the Y= editor by using the

image1.png

keys to place the cursor on the equal sign in the definition of the sequence and then pressing [ENTER] to toggle the equal sign between highlighted and unhighlighted. In the example, the calculator won’t graph sequence w(n), but it will graph u(n) and v(n).

image2.jpg
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