No Title |POLVER05_0 |1
## Predator/Prey model
#differential equations and initial values
d(nc) / d(t) = -b*nc+alpha*k*ns*nc #Change coyote population with time
nc(0) = 20
d(ns) / d(t) = a*ns-k*ns*nc #Change in sheep population with time
ns(0) = 2000
# values of constants
a=0.005
b=0.0005
k=0.00012
alpha=0.002
# Initial and final values of time
t(0) = 0
t(f) = 12000
## plot number of coyotes x 100 so easier to see on same plot as sheep
ncplot= 100*nc