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Predator-Prey Model
Predator-Prey Model
Predator-Prey Model
Predator-Prey Model
Use the two coupled 1st-order differential equations:
y1' = Ly1 + 0.1y1 ùy2 and y2' = 3y2 Ny1 ùy2
where:
y1
= Population of foxes
yi1 = Initial population of foxes (2)
y2
= Population of rabbits
yi2 = Initial population of rabbits (5)
1. Use 3 to set
.
EQUATIONS
2. In the Y= Editor (8 #), define the
differential equations and enter the
initial conditions.
To speed up graphing times, clear
Note:
any other equations in the Y= Editor. With
, all equations are evaluated even
FLDOFF
if they are not selected.
Differential Equation Graphing
Graph = DIFF
436
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