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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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    \[\sum_{n=1}^{3}i^(n-1)\]

  2. anonymous
    • 5 years ago
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    in the second equation the right side of the sigma should read i^(n-1)

  3. bahrom7893
    • 5 years ago
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    do you mean i as in imaginary number?

  4. bahrom7893
    • 5 years ago
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    \[\sum_{n=1}^{3}i^{(n-1)}\] where i^2 =-1?

  5. anonymous
    • 5 years ago
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    yes

  6. bahrom7893
    • 5 years ago
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    \[\sum_{n=1}^{3}i^{n-1} = i^{1-1} + i^{2-1} + i^{3-1}\]

  7. bahrom7893
    • 5 years ago
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    \[i^0 + i + i^2 = 1 + i -1 = i\]

  8. anonymous
    • 5 years ago
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    okay thats what i got, thank you. can you take a look at the problem above that

  9. bahrom7893
    • 5 years ago
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    oh for that u need to use a calculator, do u want me to write the equation of the line?

  10. anonymous
    • 5 years ago
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    yeah i understand that but how would you know which type of regression to use?

  11. bahrom7893
    • 5 years ago
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    I think you just try every single one, and the one that goes through the most points will be the one to use, because calculator would approximate all equations. So just try all three, and whichever one comes closest to as many points as possible will be the one to use.

  12. bahrom7893
    • 5 years ago
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    well, that's how I used to do it, back in hs

  13. anonymous
    • 5 years ago
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    how do i graph it? i put in the type of regression and then (L1,L2) then how do I graph it?

  14. bahrom7893
    • 5 years ago
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    okay what calculator are you using?

  15. bahrom7893
    • 5 years ago
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    Ti 84? 89? 83?

  16. anonymous
    • 5 years ago
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    TI-83

  17. bahrom7893
    • 5 years ago
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    http://www.mathstore.net/graphing-calculators/TI-84/how-to-linear-regression.php

  18. anonymous
    • 5 years ago
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    yeah i got that but my graph axis are bolded i dont know how to get out of that i clicked zoom out a couple of times but it wont work

  19. bahrom7893
    • 5 years ago
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    try zoom fit

  20. anonymous
    • 5 years ago
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    its not doing antyhing

  21. bahrom7893
    • 5 years ago
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    try decimal

  22. anonymous
    • 5 years ago
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    what does that mean?

  23. anonymous
    • 5 years ago
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    i got it thank you

  24. bahrom7893
    • 5 years ago
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    okay i gtg now and that meant zoom decimal

  25. anonymous
    • 5 years ago
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    nothings graphing though

  26. bahrom7893
    • 5 years ago
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    which means u have to try a different regression

  27. bahrom7893
    • 5 years ago
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    and make sure the plots are selected in the y-editor

  28. bahrom7893
    • 5 years ago
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    sorry i gtg now, will try to respond later again

  29. anonymous
    • 5 years ago
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    yeah they are

  30. anonymous
    • 5 years ago
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    ok thanks

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