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.
