Knowledge by Design - TLMC - Linear Regression Graph Pad

		TLMC - Interactivity - Linear Regression	Last Updated: Dec. 11, 2002

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Linear Regression Graph Pad
This page is developed and maintained by Yue-Ling Wong, Ph. D.

An handy on-line linear regression graphing pad for a fast grip of your data distribution.

Instruction:

Click on the graph to draw your data points (multiple data points).
Click the linear regression button to calculate and plot the regression line.
If you need to plot more than one line on the same plot, repeat the above two steps.
Click the reset button to erase the lines and start over.

Background:
The linear relationship between dependent variable y and independant variable x is

y = a + bx

where a is the intercept and b is the slope

equation 1

x_i and y_i are individual pairs of data
are the average value of the variables