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anonymous

  • one year ago

Ill medal , and fan . In a comparison of the number of hours spent studying for a test and a student's grade on the test, the line of best fit was found to be y = 12.5x + 75, with a correlation coefficient of 0.9. Based on this information, what is the meaning of the y-intercept of the equation? Students earn 12.5 additional points on the test for each hour studied. Students earn 75 additional points on the test for studying at least an hour. There is no relationship between the two variables, so the y-intercept has no meaning. Students who don't study would expect to score a 75

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  1. jim_thompson5910
    • one year ago
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    hints: the y intercept occurs when x = 0 x = number of hours studied y = score on the test

  2. anonymous
    • one year ago
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    So it is A ? @jim_thompson5910

  3. jim_thompson5910
    • one year ago
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    `Based on this information, what is the meaning of the y-intercept of the equation?`

  4. jim_thompson5910
    • one year ago
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    what is the y intercept of `y = 12.5x + 75` ?

  5. anonymous
    • one year ago
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    75 ?

  6. anonymous
    • one year ago
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    So its D right ?

  7. jim_thompson5910
    • one year ago
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    yeah if x = 0 then y = 75 telling us that we predict that those who don't study at all will get a 75

  8. anonymous
    • one year ago
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    Thank you .

  9. jim_thompson5910
    • one year ago
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    no problem

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