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Inverse to Direct variance

  1. Sep 4, 2008 #1
    1. The problem statement, all variables and given/known data

    The data below:

    I(A): 6 12 18 24
    F(R): 240 120 80 60

    Rearrange the values of R so that a straight line graph will result.

    2. Relevant equations

    I have to find a proportional equation for I and F. Something like I = F

    3. The attempt at a solution

    I understand I have to find the difference in proportion. Something like 60/240 and 24/6 and then I have to compare the numbers. This is where I need help. In addition, I don't know what the "rearrange" means and how will I make a straight line graph?

    Please help. Thanks.
  2. jcsd
  3. Sep 4, 2008 #2


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    "Rearrange" means put the numbers in a different order.

    1 2 4 3 can be rearranged to give 4 1 3 2.
  4. Sep 4, 2008 #3
    I'm afraid not. It's a rule of thumb that scientific results are not "rearranged". I think it's more proportion based. I have to find the linking proportion, but that's where I am stuck.
  5. Sep 5, 2008 #4


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    Try arranging the numbers in F(R) in order, from lowest to highest. But first fix this typo: "80" should really be "180".

    If you do that, the proportion equation will be practically staring you right in the face.
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