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DarkendSinz30

  • 3 years ago

For the table that follows, answer the following questions: x y 1 -1 2 -5 3 -9 4 - Would the correlation between x and y in the table above be positive or negative? - Find the missing value of y in the table. - How would the values of this table be interpreted in terms of linear regression? - If a “line of best fit” is placed among these points plotted on a coordinate system, would the slope of this line be positive or negative?

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  1. DarkendSinz30
    • 3 years ago
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    Can u help me out?

  2. srw1496
    • 3 years ago
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    i can attempt to but idk if i'll be right lol

  3. srw1496
    • 3 years ago
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    the missing value is -13 i think

  4. DarkendSinz30
    • 3 years ago
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    thats all that matters at the moment been working on this test for the past 9 hours and have had trouble with 4 problems

  5. srw1496
    • 3 years ago
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    i think the correlation is negative but idk for sure

  6. DarkendSinz30
    • 3 years ago
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    |dw:1354422222993:dw| This is the table kinda looks like

  7. srw1496
    • 3 years ago
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    the slope of the line of best fit would be negative too i think

  8. mahmit2012
    • 3 years ago
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    |dw:1354422393361:dw|

  9. mahmit2012
    • 3 years ago
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    |dw:1354422478255:dw|

  10. mahmit2012
    • 3 years ago
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    |dw:1354422618536:dw|

  11. DarkendSinz30
    • 3 years ago
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    Sorry Mahmit can you type that it is hard to read the drawing of what your saying I can read some of it but not the words themselves

  12. mahmit2012
    • 3 years ago
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    |dw:1354423129456:dw|

  13. mahmit2012
    • 3 years ago
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    |dw:1354423246667:dw|

  14. DarkendSinz30
    • 3 years ago
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    right it is asking for the last number in the table

  15. DarkendSinz30
    • 3 years ago
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    which would be -13 correct?

  16. DarkendSinz30
    • 3 years ago
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    ?

  17. DarkendSinz30
    • 3 years ago
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    Jim what is he saying?

  18. jim_thompson5910
    • 3 years ago
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    idk why you're going through all this trouble with regression when all points lie on the same line...namely y = -4x + 3 How did I get this? As you increase x, y is decreasing by 4 each time. So the slope is -4/1 = -4 So y = mx + b y = -4x + b -1 = -4(1) + b -1 = -4 + b -1 + 4 = b 3 = b b = 3 So the equation of the line is y = -4x + 3 You can check this by plugging in x = 1 to get y = -4x + 3 y = -4(1) + 3 y = -4 + 3 y = -1 So when x = 1, y is y = -1 Now plug in x = 2 to get y = -4x + 3 y = -4(2) + 3 y = -8 + 3 y = -5 So when x = 2, y is y = -5 Finally, plug in x = 3 to get y = -4x + 3 y = -4(3) + 3 y = -12 + 3 y = -9 So when x = 3, y is y = -9

  19. jim_thompson5910
    • 3 years ago
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    When x = 4, y is... y = -4x + 3 y = -4(4) + 3 y = -16 + 3 y = -13 So when x = 4, y is y = -13

  20. DarkendSinz30
    • 3 years ago
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    Thank you jim I have been on this stupid problem for over 4 hours trying to figure out the equation to use for it. Thank you so much

  21. jim_thompson5910
    • 3 years ago
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    yw

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