Tip 8: Finding The Best Line Of Fit For A Set Of Data - Texas Instruments TI-83 Plus Software Manual

• TIpË 8: Finding the Best Line of Fit for a Set of Data

The TI 83 Plus has regression commands that automatically find the closest equation to your
statistical plot data. The
displays the values for
You can save this equation in the Y= editor so that you can graph the regression equation and the
statistical plot data at the same time, and then compare the two.
Calculator Keys Used in This _ TIp
( CALC menu)
_ TIp Highlights
_ _
This TIp shows you how to use
of two list names,
XList
define the statistical plot.
Note: For more information about statistical plots, see
• Ë
In the Try-It! example, you will find a linear regression following these main steps.
1. Select LinReg(ax+b)
2. Enter the two list names that define the statistical plot.
3. Save the equation in the Y= editor.
4. Graph the statistical plot and the linear regression.
Note: The examples in the next section assume that the calculator has been reset to the default settings as described in
_
TIp 1: Resetting Your Calculator.
Fundamental Topics in Science
LinReg(ax+b) command finds the closest linear equation
a (slope) and b (y-intercept) on the Home screen.
Statistical plot data points
Linear Regression line based
on statistical plot data
LinReg(ax+b)
LinReg(ax+b)
( ) and ( ). You will use the same list values that you used to
L YList L
1 2
_ _
TIp 7: Creating a Statistical Plot .
from the CALC
© 2001 Texas Instruments

TIp 8: Finding the Best Line of Fit for a Set of Data

on the Home screen to find the linear regression
menu.
y=ax+b and
• TIp 8-1