Chapter 6: Sequence Graphing
112
1. Press
o
in
Seq
mode to display the sequence Y= editor. Define the sequences and initial
values for R
n
and W
n
as shown below. Enter the sequence
R
n
as
u(
n
)
and enter the sequence
W
n
as
v(
n
)
.
2. Press
y
.
Í
to select
Time
axes format.
3. Press
p
and set the variables as shown below.
4. Press
s
to graph the sequence.
5. Press
r
~
to individually trace the number of rabbits (
u(
n
)
) and foxes (
v(
n
)
) over time (
n
).
Note:
Press a number, and then press
Í
to jump to a specific
n
value (month) while in
TRACE.
D
= fox population death rate without rabbits
(.03)
n
= time (in months)
R
n
= R
n
N
1
(1+M
N
KW
n
N
1
)
W
n
= W
n
N
1
(1+GR
n
N
1
N
D)
n
Min=0
n
Max=400
PlotStart=1
PlotStep=1
Xmin=0
Xmax=400
Xscl=100
Ymin=0
Ymax=300
Yscl=100
