The Math Forum

Ask Dr. Math - Questions and Answers from our Archives
Associated Topics || Dr. Math Home || Search Dr. Math

What is the Regression Line?

Date: 08/09/99 at 22:30:51
From: Alison Silva
Subject: Regression Line

I do not understand what "regression line" means in the following

"Calculate the equation of the regression line of y on x, and plot the
line on your diagram (a scatter diagram)."

Date: 08/09/99 at 22:41:11
From: Doctor Tom
Subject: Re: Regression Line

The "regression line" is the equation for a line (usually of the form
y = mx + b, where you determine the values of m and b) such that the
line is "as close as possible" to passing through all the points.

By "as close as possible" is usually meant the line that minimizes the
sum of the squares of the errors in the y-direction. A good statistics
book can illustrate how to do this; the Rice Virtual Lab in Statistics
HyperStat pages on regression lines offer this method:   

- Doctor Tom, The Math Forum   
Associated Topics:
High School Statistics

Search the Dr. Math Library:

Find items containing (put spaces between keywords):
Click only once for faster results:

[ Choose "whole words" when searching for a word like age.]

all keywords, in any order at least one, that exact phrase
parts of words whole words

Submit your own question to Dr. Math

[Privacy Policy] [Terms of Use]

Math Forum Home || Math Library || Quick Reference || Math Forum Search

Ask Dr. MathTM
© 1994- The Math Forum at NCTM. All rights reserved.