TI -86 用户手册

03MATH.DOC   TI-86, Chap 3, US English   Bob Fedorisko   Revised: 02/13/01 2:19 PM   Printed: 02/13/01 3:00 PM   Page 53 of 10

03MATH.DOC   TI-86, Chap 3, US English   Bob Fedorisko   Revised: 02/13/01 2:19 PM   Printed: 02/13/01 3:00 PM   Page 53 of 10

Using the interpolate

àextrapolate editor, you can interpolate or extrapolate a value linearly,

given two known pairs and the x-value or y-value of the unknown pair.

�   Display the interpolate

àextrapolate editor.

�   Enter real values for the first known pair

(x1,y1). The values can be expressions.

- Œ / &

 b 

 b

�   Enter values for the second known pair

(x2,y2).

 b 

 b

�   Enter a value for either the 

 value or the

 

 value of the unknown pair.

�   If necessary, move the cursor to the value

for which you want to solve (

 or 

).

�   Select 

.

 b

$ or #

*

The result is interpolated or extrapolated and displayed; the variables 

 and 

 are not

changed. A solid square in the first column indicates the interpolated or extrapolated value.

After solving for a value, you can continue to use the interpolate

àextrapolate editor.

To interpolate y from the
home screen, select 

from the 

CATALOG

, and then

enter 

.

To interpolate x from the
home screen, enter

.

You can store individual
values with the  

X

 key

(Chapter 2).