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anonymous

  • one year ago

Isaac keeps track of the miles per gallon his car gets per week. He has accumulated the following data: (1, 24), (2, 24.48), (3, 24.97), (4, 25.47) What is the common difference or ratio? A. The common difference is 0.48. B. The common difference is 0.50. C. The common ratio is 0.98. D. The common ratio is 1.02.

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  1. welshfella
    • one year ago
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    check for a common difference by working out 24.48 - 24 , then third value - second and 4th value - third to see if they are the same

  2. anonymous
    • one year ago
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    C?

  3. welshfella
    • one year ago
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    did you check the common differences?

  4. welshfella
    • one year ago
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    Why do you think its is C?

  5. anonymous
    • one year ago
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    idk

  6. welshfella
    • one year ago
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    you check the common ratio as follows r = 24.48 / 24 , 24.97 / 24.48 and 25.47/24.97

  7. welshfella
    • one year ago
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    the common ratio multiplies each term to get the next common difference adds the same value to get the next term

  8. welshfella
    • one year ago
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    can you work out those divisions 24.48 / 24 = ? use your calculator

  9. anonymous
    • one year ago
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    1.02 sorry i was talking to my teacher

  10. welshfella
    • one year ago
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    thats correct now try 24.97 / 24.48 and 25.47/24.97 if these 2 are also 1.02 you'll know the correct choice

  11. anonymous
    • one year ago
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    1.020016339869281 and 1.020024028834602

  12. anonymous
    • one year ago
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    so D

  13. welshfella
    • one year ago
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    right - well we won't worry about about the decimals after 1.0200 Yes it is D.

  14. anonymous
    • one year ago
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    thnx :)

  15. welshfella
    • one year ago
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    A gave differences or 0.48, 0.49 and 0.50 so its not an arithmetic sequence

  16. welshfella
    • one year ago
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    yw

  17. welshfella
    • one year ago
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    I could have just given you the answer but you learn more by getting involved yourself

  18. anonymous
    • one year ago
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    thnx :)

  19. welshfella
    • one year ago
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    yw

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