Operation Manual

Chapter 14: Applications 263
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
Graph-Table split-screen
mode, so that the graph and table are displayed
simultaneously.
Press r to display
X1T (time) and Y1T (balance)
in the table.