Texas Instruments TI-83 PLUS - Manual (Page 200)

TI-83 Plus Sequence Graphing 197
Graphing Phase Plots
Graphing with uv, vw, and uw
The phase-plot axes settings uv , vw , and uw show relationships between
two sequences. To select a phase-plot axes setting, press y . ,
press ~ until the cursor is on uv , vw , or uw , and then press Í .
Axes Setting x-axis y-axis
uv u( n) v( n)
vw v( n) w( n)
uw u( n) w( n)
Example: Predator-Prey Model
Use the predator-prey model to determine the regional populations of a
predator and its prey that would maintain population equilibrium for the
two species.
This example uses the model to determine the equilibrium populations of
foxes and rabbits, with initial populations of 200 rabbits (
u( nMin) ) and 50
foxes ( v( nMin) ).