Phase Portrait

> IC := [ x(0)=0, y(0)=2 ];

> PHASEplot := DEplot( MODEL, VAR, DOMAIN, [ IC ], WINDOW,

> arrows=NONE, # use arrows=SLIM to see direction field

> scene=[ x, y ], linecolor=BLUE,

> title = `Phase Portrait for #10` ):

> PHASEplot;

>