TI-84 Plus CE Graphing Calculator For Dummies, 3rd Edition
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With the TVM Solver, you can graph an amortization table on your TI-84 Plus calculator. An amortization schedule shows the amount of interest and principal for each periodic payment made over the life of a loan. An amortization schedule doesn’t usually fit on one page. Wouldn’t it be great to see a visual snapshot of a loan amortization showing the remaining balance for each period of the loan?

The easiest way to graph an amortization table is by using a parametric graph. To graph an amortization of the following problem, press [MODE] and change the mode to PARAMETRIC.

The average home price in Memphis, Tennessee, is $154,985. If the interest rate on a 30-year loan in 4.73%, what will the monthly payment be?

Press [Y=] and enter X1T=T. In Parametric mode, press


to enter T. Enter Y1T=bal(T).

To insert the balance command, press [APPS][ENTER][9] to insert the bal( command. See the first screen in the figure.


Press [WINDOW] and configure the window variables as shown in the second screen in the figure. Press [GRAPH] to view the graph of the amortization.

The x-value of the graph is the payment number and the y-value of the graph is the remaining balance. Press [TRACE] to take a closer look at your graph as shown in the third screen in the figure.

About This Article

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About the book author:

Jeff McCalla is a mathematics teacher at St. Mary's Episcopal School in Memphis, TN. He cofounded the TI-Nspire SuperUser group, and received the Presidential Award for Excellence in Science & Mathematics Teaching.

C.C. Edwards is an educator who has presented numerous workshops on using TI calculators.

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