Texas Instruments TI-83-Plus Guide Book

TIp 8: Finding the Best Line of Fit for a Set of Data
Topics in Algebra 1 © 2001 Texas Instruments
³
TIp 8-3
³
Try-It!
é
on Your TI
.
83 Plus or TI
.
73
(continued)
Find the Linear Regression for the Scatter Plot
Find the regression (the line which best fits the data) for
L
1
and
L
2
using
LinReg(ax+b)
.
To Do This Press Display
(TI-83 Plus shown)
1. Return to the Home screen, and clear
it.
- l :
2. Select
LinReg(ax+b)
from the
STAT
CALC
menu.
TI
-
83 Plus:
…
"
4:LinReg(ax+b)
TI
-
73:
- v !
5:LinReg(ax+b)
3. Select the lists
L
1
and
L
2
.
TI
-
83 Plus:
y 9
1:L
1
¡
y 9
2:L
2
¡
TI
-
73:
- v
1:L
1
¡
- v
2:L
2
¡
4. Display
Y-VARS
menu. Then select
the Y variable (
Y
1
) from the
FUNCTION
menu.
5. Calculate the regression equation.
TI
-
83 Plus:
 ~
1:Function
1:Y
1
b
TI
-
73:
- }
2:Y-Vars
1:Y
1
b
6. Display the Y= editor.
Note
: Both
Y
1
and
Plot1
are highlighted. This
means that both graph and the plot are turned on.
&

Texas Instruments TI-83-Plus Specifications

General

Display Type	LCD
Display Resolution	96 x 64 pixels
Power Source	4 AAA batteries
Programming Language	TI-BASIC, Z80 Assembly
Backup Power	CR1616 or CR1620 lithium battery
RAM	24 KB
Processor	Zilog Z80
Weight	7.4 oz (210 g) with batteries
Dimensions	7.3 x 3.5 x 0.9 inches