Chapter 14: Applications 260
3. Press
360 to enter number of payments. Press † 8 to
enter the interest rate. Press † † Ì
800 to enter the
payment amount. Press †
0 to enter the future value
of the mortgage. Press †
12 to enter the payments per
year, which also sets the compounding periods per
year to 12. Press † † Í to select
PMT:END.
4. Move the cursor to the
PV prompt and then press ƒ
\ to solve for the present value.
5. Press o to display the parametric Y= editor. Turn off
all stat plots. Press „ to define
X1T as T. Press †
Œ Í
9 „ ¤ to define Y1T as bal(T).
6. Press p to display the window variables. Enter the
values below.
Tmin=0 Xmin=0 Ymin=0
Tmax=360 Xmax=360 Ymax=125000
Tstep=12 Xscl=50 Yscl=10000
7. Press r to draw the graph and activate the trace
cursor. Press ~ and | to explore the graph of the
outstanding balance over time. Press a number and
then press Í to view the balance at a specific
time T.
8. Press y - and enter the values below.
TblStart=0
@Tbl=12
9. Press y 0 to display the table of outstanding
balances (
Y1T).
10. Press z and select
G-T split-screen mode, so that
the graph and table are displayed simultaneously.
Press r to display
X1T (time) and Y1T (balance) in
the table.
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