Texas Instruments TI-86 User Manual

Page 106

Chapter 6: Graph Tools

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

ᕡ Check

xFact

and

yFact

; change as needed.

6 (
/ /
'

ᕢ Select

ZIN

from the

GRAPH

ZOOM

menu to

display the zoom cursor.

ᕣ Move the zoom cursor to the intended new

center point of the graph screen.

( '
" # ! $

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

xFact

and

yFact

, updates window variable

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

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

xFact

, select

ZOOMX

instead of

ZIN

step 2 above.

ZOOMX

plots the selected functions centered on the cursor location and

updates some window variable values;

yMin

and

yMax

are unchanged.

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

yFact

, select

ZOOMY

instead of

ZIN

step 2 above.

ZOOMY

plots the selected functions centered on the cursor location and

updates some window variable values;

xMin

and

xMax

are unchanged.

In the example, the function
y(x)=x^3+.3x

is graphed.

When you select a ZOOM
feature, Smart Graph
displays the current graph.

To cancel a zoom before you
complete it, press