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anonymous

  • one year ago

A set of data points has an equation of = -1.5 + 2.5x. What is the residual for the point (5, 12)? A. 1 B. -1 C. 11 D. 12

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  1. jim_thompson5910
    • one year ago
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    when you plug x = 5 into -1.5 + 2.5x, what do you get?

  2. anonymous
    • one year ago
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    @jim_thompson5910 When i id it befor it didnt work and said it was wrong

  3. anonymous
    • one year ago
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    did*

  4. jim_thompson5910
    • one year ago
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    what result did you get

  5. anonymous
    • one year ago
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    11

  6. anonymous
    • one year ago
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    C

  7. jim_thompson5910
    • one year ago
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    the point given is (5,12) the observed y value is 12 the predicted y value you got is y-hat = 11

  8. jim_thompson5910
    • one year ago
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    \[\LARGE \text{residual} = (\text{observed y}) - (\text{predicted y})\] \[\LARGE \text{residual} = (y) - (\hat{y})\] \[\LARGE \text{residual} = (12) - (11)\] I'm sure you see how to finish up here

  9. anonymous
    • one year ago
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    So it is 1

  10. anonymous
    • one year ago
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    the Large text is weird looking

  11. jim_thompson5910
    • one year ago
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    yes the difference between what reality is and what the predicted value is

  12. jim_thompson5910
    • one year ago
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    sorry I probably went too big lol

  13. anonymous
    • one year ago
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    it is ok =3

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