A phase portrait of a predator-prey system is given below in which F represents the population of foxes (in thousands) and R the population of rabbits (in thousands). (a) Referring to the graph, what is a reasonable non-zero equilibrium solution for the system?
(b) Write down a possible system of differential equations which could have been used to produce the given graph.(c) Describe how each population changes as time passes, using the initial condition P indicated on the graph.(d) Use your description in part (c) to make a rough sketch of the graph of R and F as functions of time.

Question

A phase portrait of a predator-prey system is given below in which F represents the population of foxes (in thousands) and R the population of rabbits (in thousands).  (a) Referring to the graph, what is a reasonable non-zero equilibrium solution for the system?
(b) Write down a possible system of differential equations which could have been used to produce the given graph.(c) Describe how each population changes as time passes, using the initial condition P indicated on the graph.(d) Use your description in part (c) to make a rough sketch of the graph of R and F as functions of time.

Quizplus · Accepted Answer

The Answer of A phase portrait of a predator-prey system is given below in which F represents the population of foxes (in thousands) and R the population of rabbits (in thousands).  (a) Referring to the graph, what is a reasonable non-zero equilibrium solution for the system?
(b) Write down a possible system of differential equations which could have been used to produce the given graph.(c) Describe how each population changes as time passes, using the initial condition P indicated on the graph.(d) Use your description in part (c) to make a rough sketch of the graph of R and F as functions of time.

A Phase Portrait of a Predator-Prey System Is Given Below