Texas Instruments TI-83 PLUS - Manual (Page 201)

TI-83 Plus Sequence Graphing 198
These are the variables (given values are in parentheses):
R = number of rabbits
M = rabbit population growth rate without foxes
(.05)
K = rabbit population death rate with foxes (.001)
W = number of foxes
G = fox population growth rate with rabbits
(.0002)
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)
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.