What is the Linear Regression Analysis Calculator?

Calculate linear regression for any set of (x, y) data pairs. Get the line of best fit, slope, intercept, Pearson's r, and a scatter plot. Includes prediction table and residual analysis.

Is the Linear Regression Analysis Calculator free to use?

Yes. The Linear Regression Analysis Calculator is free to use on Calculate.co.nz, with no sign-up, paywall or account required.

Is the Linear Regression Analysis Calculator made for New Zealand?

Yes. It is built for New Zealand and uses current New Zealand rules and rates where they apply. Results are indicative estimates and not financial advice.

Linear Regression Analysis Calculator

Many relationships resemble linear relationships of some kind. For instance, it may be expected that the price of an item and how much of it is purchased resembles a linear relationship. Mathematically, it is possible to fit a line to such data where fluctuations in one piece of data, in this case the price of an item, correlates with fluctuatons in some other piece of data, quantity in our example. One can fit a line to this pattern so as to make reasonable predictions about the behaviour of the relationship at hand. You may enter two data sets, much like price and quantity as illustrated here, call them x (independent variable) and y (dependent variable). The y variable is the variable you are trying to predict. In the table, Y' is the predicted value, that value that the line is determining for the given X. Then you have the difference between the observed and the predicted (Y - Y') and that value squared. The graph that emerges shows the observed Ys (blue dots) and the prediction line calculated (blue line). Try it and see.

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Enter the number of (x,y) data pairs:

X	Y	Y'	Y - Y'	(Y - Y')²

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