LeastSquares Line
Pronunciation: /list skwɛərz laɪn/ Explain
A leastsquare line is a line that minimizes the
distance between the data points it
represents
and the line itself. Manipulative 1 is an example of a least squares
line fitted to data.

Click on the blue points and drag them to change the figure.
Move the points to create a nearvertical line. Move the points to create a nearhorizontal line.
 Manipulative 1  Least Squares Line Created with GeoGebra. 

How to Calculate a Least Squares Line
In the equations, N is the number of points. x
is the xcoordinate of a point. y is the ycoordinate of
a point. All calculated amounts are approximate.
Legend  x 
y 
x^{2} 
xy 
A  0.3 
1.8  0.09 
0.54 
B  0.8 
2.2  0.64 
1.76 
C  1.9 
2.6  3.61 
4.94 
D  2.2 
2.1  4.84 
4.62 
E  3.3 
2.9  10.89 
9.57 
F  3.9 
2.5  15.21 
9.75 
Sum  12.4  14.1 
35.28  31.18 
References
 McAdams, David E.. All Math Words Dictionary, leastsquares line. 2nd Classroom edition 201501084799968. pg 107. Life is a Story Problem LLC. January 8, 2015. Buy the book
Cite this article as:
McAdams, David E. LeastSquares Line. 4/24/2019. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/l/leastsquareline.html.
Image Credits
Revision History
4/24/2019: Changed equations and expressions to new format. (
McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (
McAdams, David E.)
8/31/2018: Removed broken links, updated license, implemented new markup, implemented new Geogebra protocol. (
McAdams, David E.)
7/18/2018: Changed title to common format. (
McAdams, David E.)
7/12/2007: Initial version. (
McAdams, David E.)