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Math Help - Linear Regression (Sxy) proof help needed

  1. #1
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    Linear Regression (Sxy) proof help needed

    Hello everyone!

    I am looking for help with proving the following:

    Sum(xi - x_bar)(yi - y_bar) = Sum(xi- x_bar)yi

    Thanks in advance!
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  2. #2
    Junior Member slider142's Avatar
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    Brooklyn, NY
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    Going through the sum, this boils down to showing that \Sigma (x_i - \bar{x}) = 0
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  3. #3
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    Aaaaahhhrrgh

    Thank you so much! I cannot believe I did not see this! Thank you again!
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