Texas Instruments TITANIUM TI-89 - Manual (Page 437)

Differential Equation Graphing 437
4. In the Y= Editor, press:
@ 2 ‰ Set
Axes = TIME .
5. In the Window Editor ( 8 $), set
the Window variables.
t0=0
tmax=10
tstep=
p /24
tplot=0
xmin= L 1
xmax=10
xscl=5
ymin=
L 10
ymax=40
yscl=5
ncurves=0
diftol=.001
6. Graph the differential equations
( 8 %).
7. Press … to trace. Then press 3
¸ to
see the number of foxes ( yc for y1 ) and
rabbits ( yc for y2 ) at t=3 .
Note: Use C and D to move the trace
cursor between the curves for y1 and y2 .
y2(t)
y1(t)