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How do I force a line of best fit to go through the origin?

My teacher is requesting that we “force” the line of best fit for our graphs to go through the origin. I cannot get the correct value for slope of the best fit line without doing so.
Also, I am using Numbers on an Apple computer but if you just give me a general Excel way to do it I could probably figure it out.

Thank you!

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2 Responses to “How do I force a line of best fit to go through the origin?”

  1. kim t said :

    use the line of best fit by your eyes

  2. im said :

    This is an option of the Excel regression function. Read the Help to see what the value should be to force the offset to zero.
    m




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