Texas TI-86 用户手册

06TOOLS.DOC   TI-86, Chap 6, US English   Bob Fedorisko   Revised: 02/13/01 2:23 PM   Printed: 02/13/01 3:01 PM   Page 94 of 22

06TOOLS.DOC   TI-86, Chap 6, US English   Bob Fedorisko   Revised: 02/13/01 2:23 PM   Printed: 02/13/01 3:01 PM   Page 94 of 22

�   Check 

 and 

; change as needed.

6 (
/ /
'

�   Select 

 from the 

GRAPH

 

ZOOM

 menu to

display the zoom cursor.

�   Move the zoom cursor to the intended new

center point of the graph screen.

( '
" # ! $

�   Zoom in. The TI-86 adjusts the graph screen by

 and 

, updates window variable

values, and replots the selected functions
centered on the cursor location.

b

You can continue to zoom in (or zoom out) on the current graph, unless you press a key
other than b, ", #, !, or $.

♦ 

To zoom in (or zoom out) again at the same point, press b.

♦ 

To zoom in (or zoom out) at a new center point, move the cursor and press b.

To zoom out only on the horizontal axis by a factor of 

, select 

 instead of 

 in

step 2 above. 

 plots the selected functions centered on the cursor location and

updates some window variable values; 

 and 

 are unchanged.

To zoom out only on the vertical axis by a factor of 

, select 

 instead of 

 in

step 2 above. 

 plots the selected functions centered on the cursor location and

updates some window variable values; 

 and 

 are unchanged.

In the example, the function

 is graphed.

When you select a 

ZOOM

feature, Smart Graph
displays the current graph.

To cancel a zoom before you
complete it, press 

:

.