Texas Instruments TI-83 Manual Book page 597

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
trace cursor to
The graph shows that for the 240th payment (
800 payment is applied to principal (
Note: The sum of the payments ( Y
8. Press † to move the cursor onto the function for interest defined by
and
X Y
2T 2T
TI-83 Plus Activities
Xmin=0
Xmax=360
Xscl=10
, which is equivalent to 20 years of payments.
T=240
. Enter .
240
Ymin=0
Ymax=1000
Yscl=100
to
Tstep
240
X=240
).
Y=358.03
) is always 800.
=Y +Y
3T 1T 2T
.
24
Í to move the
), 358.03 of the
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