Applied Formulas: |

Best linear equation through the data point dispersion | |

where | |

n | Number of matching XY data pairs (at least 2) |

a | Slope or tangent of the angle of the regression line |

b | Y-Intercept (y value at x=0) |

Sum of all X data values | |

Sum of all Y data values | |

Sum of products of all matching XY data pairs | |

Sum of squares of all X data values | |

Sum of squares of all Y data values | |

Some technical details
This program was simply designed to determine only the (a, b) components of the linear equation derived from the given dual XY data columns. This version does not compute the correlation. The value of (n), the number of data points (XY pairs), is determined by the program by simply counting the XY data pairs that were entered in the table. You don't have to enter the value of (n). Simply copying and pasting the data in the form of a numerical 2-column, space-delimited, X vs Y data table and clicking [Compute] is the easiest way to use the program. NOTE: The data can also be delimited by commas (,) or semicolons (:), instead of spaces. |