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anonymous

  • one year ago

Which equation best models the data in the scatter plot? http://www.intervisualtechnology.us/data/1/12970/u8l6q5.JPG A) y = 15 B) y = (-½)x + 26 C) y = (-⅖)x + 19 D) y = (-⅘)x + 33 Please help I am so confused? Thanks

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  1. anonymous
    • one year ago
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    use an online linear regression tool like: http://www.alcula.com/calculators/statistics/linear-regression/

  2. anonymous
    • one year ago
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    Just look at the graph you have been given, each point has an x and y value. go to the x axis note the x-value of the point, and then go to the y axis, and note its you value. Example:

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  3. anonymous
    • one year ago
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    Enter the x and y values into the online linear regression tool and you will get your answer

  4. anonymous
    • one year ago
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    here, I have filled in all the x and y coordinates for you to enter: if it is small just expand it:

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  5. anonymous
    • one year ago
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    here is the data I entered:

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  6. anonymous
    • one year ago
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    And here is the result I got:

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  7. anonymous
    • one year ago
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    From the results, the equation of the line of best fit is approximately: y=26 - 0.49 x

  8. anonymous
    • one year ago
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    Rearranging this we get: y= -0.49x + 26 which basically correspond to option B. Answer = B

  9. anonymous
    • one year ago
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    Thank You!

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