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anonymous

  • 4 years ago

how do you find the equation of a line of best fit? please help!!

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  1. anonymous
    • 4 years ago
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    Do you have a graph?

  2. anonymous
    • 4 years ago
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    yes

  3. anonymous
    • 4 years ago
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    Exactly what do you need help with?

  4. anonymous
    • 4 years ago
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    i dont know what steps to do in order to find the equation of the line of best fit

  5. anonymous
    • 4 years ago
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    look for the y-intercept first. If the equation is in the form y=mx+b, b is the y-intercept, which is the point the line crosses the graph

  6. anonymous
    • 4 years ago
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    -5.4

  7. anonymous
    • 4 years ago
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    Next look for the slope, m, which is \[\frac{y2-y1}{x2-x1}\]

  8. anonymous
    • 4 years ago
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    do i get 2 ploted points?

  9. anonymous
    • 4 years ago
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    If you have plotted points, then you can substitute them into that equation for slope

  10. anonymous
    • 4 years ago
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    after that do i just plug the slope and the y-intercept into the equation?

  11. anonymous
    • 4 years ago
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    if you know the slope and the y-intercept, you can identify the graph

  12. anonymous
    • 4 years ago
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    ok thank you so much

  13. anonymous
    • 4 years ago
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    np

  14. anonymous
    • 4 years ago
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    :)

  15. amistre64
    • 4 years ago
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    the mean of your xs and the mean of your ys will be a point on the line of best fit \[(\bar x,\bar y)\] is on the line so we just need to determine a good slope to use

  16. amistre64
    • 4 years ago
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    i cant recall how the average slope is obtained; personally I just use excel to calculate the slopes and pick the average fromthe interquartile range ..... but thats not "proper" :)

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