**Linear regression calculator - GraphPad**
https://www.graphpad.com/quickcalcs/linear2/

The linear regression interpretation of the slope coefficient, m, is, "The estimated change in Y for a 1-unit increase of X." The interpretation of the intercept parameter, b, is, "The estimated value of Y when X equals 0." The first portion of results contains the best fit values of the slope and Y-intercept terms. ...

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