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anonymous

  • 5 years ago

for the following set of data find an appropriate regression equation (linear, exponential, or logarithmic) state your reason x: 1,2,3,4,5 y: 112,114, 119, 122, 129

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  1. anonymous
    • 5 years ago
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    ok so look at the y values you go from +2, +5, +3, +7, etc...what type of pattern do you think it is?

  2. anonymous
    • 5 years ago
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    i mean you go from 112 to 114 by adding 2 etc

  3. anonymous
    • 5 years ago
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    im not sure i dont know how to do this problem

  4. anonymous
    • 5 years ago
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    ok well i would define it as a piecewise function actually hold on.........hmmmm let me think about this

  5. anonymous
    • 5 years ago
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    were looking for a regression equation such as exponential linear or logarithmic

  6. anonymous
    • 5 years ago
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    yeah i know...i was just seeing if you could possibly use two different ones and define them only for when x is odd and another for when x is even...

  7. anonymous
    • 5 years ago
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    yeah i thought it was exponential and linear but i'm not sure..

  8. anonymous
    • 5 years ago
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    its definitely not log

  9. anonymous
    • 5 years ago
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    did you plug it in your calculator?

  10. anonymous
    • 5 years ago
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    yeah buts its not regression

  11. anonymous
    • 5 years ago
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    why not ?

  12. anonymous
    • 5 years ago
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    idk..its not perfect linear...

  13. anonymous
    • 5 years ago
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    so now what

  14. anonymous
    • 5 years ago
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    ?

  15. anonymous
    • 5 years ago
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    i would just say linear because there is no way to fit it to log or exp

  16. anonymous
    • 5 years ago
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    how do you put this in the calculator i don't know how to

  17. anonymous
    • 5 years ago
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    what calculator do you have?

  18. anonymous
    • 5 years ago
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    ti-83

  19. anonymous
    • 5 years ago
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    ok so turn it on go to stat go to edit you'll see like L1, L2, etc in L1 put in your x values and in L2 put the y values then quit do 2nd, Y= go to 1: go On then go zoom, go zoomfit

  20. anonymous
    • 5 years ago
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    make sure in Y= that the plot1 is highlighted

  21. anonymous
    • 5 years ago
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    ok now what

  22. anonymous
    • 5 years ago
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    just go graph

  23. anonymous
    • 5 years ago
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    its just points plotted..

  24. anonymous
    • 5 years ago
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    haha i know now you can fit the graph

  25. anonymous
    • 5 years ago
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    how?

  26. anonymous
    • 5 years ago
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    ok so you want to go stat go to calc go to linreg(ax+b) then put L1, L2 after in the main screen

  27. anonymous
    • 5 years ago
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    what do u mean main screen

  28. anonymous
    • 5 years ago
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    the main screen is where you do all the math...like would do cos(30), 5+1, sqrt(9)...

  29. anonymous
    • 5 years ago
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    when you click lin reg(ax+b) it will take you to the main screen

  30. anonymous
    • 5 years ago
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    well after i hit lin reg then what

  31. anonymous
    • 5 years ago
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    press 2nd 1 , 2nd 2 enter you get a linear regression y = 4.2x + 106.6

  32. anonymous
    • 5 years ago
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    no i got 4x+ 107.4

  33. anonymous
    • 5 years ago
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    did you enter it right? hmm........ press 2nd 0 scroll to actually no...that should not be correct

  34. anonymous
    • 5 years ago
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    its close enough :)

  35. anonymous
    • 5 years ago
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    okk what do i do now..

  36. anonymous
    • 5 years ago
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    justify its linear...haha what stat is this for?

  37. anonymous
    • 5 years ago
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    noo but shouldnt there be a line going through those points ?

  38. anonymous
    • 5 years ago
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    yeah but look at the graph... do you know the concept of a floor? its like the greatest integer function...and then add like one to it...that should make it approximate. idk unless it has to be regression....then you could try exponential shifted way up...but its the 4th term that makes me question that possibility...

  39. anonymous
    • 5 years ago
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    do i plug the linear regression into y=?

  40. anonymous
    • 5 years ago
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    yeah the equation is supposed to be an approximate for the data

  41. anonymous
    • 5 years ago
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    but both the linear regression and exponential equations lie in the same place?

  42. anonymous
    • 5 years ago
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    ...what?

  43. anonymous
    • 5 years ago
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    when i plug the linear regression equation into the y= i end up with a line going across the graph and then when i plug in the exponential regression into the y= the line lays in the same place as the linear regression equation line

  44. anonymous
    • 5 years ago
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    is your data correct? idk but i gotta go so when is this due? monday? i can try to help you tomorrow or something...

  45. anonymous
    • 5 years ago
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    yea i put 113 instead of 112

  46. anonymous
    • 5 years ago
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    107.1678132(1.035666278^x) is tht the expreg?

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