Phase Portrait

Next we plot the hare and lynx populations against one another in what is called a PHASE PORTRAIT. We do this for two different initial conditions. Can you identify which curve goes with which initial condition? How is the independent variable t showing up in these pictures? (Hint: try it again with time interval t = 0 .. 20, or use the option arrows = SLIM.)

> DEplot( MODEL, vars, domain,[ init2, init3 ], stepsize=0.5, scene=[h,u], title = `Hares vs. 100 * Lynxes for t = 0 .. 320`, arrows= NONE) ;

>