Texas Instruments TITANIUM TI-89 - Manual (Page 107)

Previews 107
4. Display the Window Editor , and set the
Window variables as shown to the right.
Press 8 $ 0 D 10 D .1 D 0 D
? 10 D 110 D 10 D ? 10 D 120 D 10
D 0 D .001 D 20
5. Display the Graph screen.
Because you did not specify an initial
condition, only the slope field is drawn (as
specified by
Fields=SLPFLD in the GRAPH
FORMATS dialog box).
Press 8 %
6. Return to the Y= Editor and enter an initial
condition:
yi1=10
Press 8 # ¸ 10 ¸
7. Return to the Graph screen.
Initial conditions entered in the Y= Editor
always occur at t
0
. The graph begins at
the initial condition and plots to the right.
Then it plots to the left.
Press 8 %
Steps and keystrokes Display
The initial condition is
marked with a circle.