Texas Instruments TI-83 Manual Book page 339

Now compare the graph of the amount of interest with the
graph of the amount of principal for each payment.
4. Press z. Set
5. Press o. Turn off all functions and stat plots. Enter
these equations and set the graph styles as shown.
GPrn(
Note: and
6. Press p. Set these window variables.
Tmin=1
Tmax=360
Tstep=12
Tip: To increase the graph speed, change
7. Press r. After the graph is drawn, press
to move the trace cursor to
to 20 years of payments.
The graph shows that for the 240th payment (
358.03 of the 800 payment is applied to principal
( ).
Y=358.03
Note: The sum of the payments (
and .
Par Simul
GInt(
are located on the
Xmin=0
Xmax=360
Xscl=10
T=240
Y =Y
3T
FINANCE CALC
Ymin=0
Ymax=1000
Yscl=100
Tstep 24
to .
Í
240
, which is equivalent
X=240
+Y
) is always 800.
1T 2T
Applications 17-19
menu.
),