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    http://www.thomas-reddington.com/upl..._june_2010.pdf

    Can someone please help me with Q6) part f
    6f)
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    regression line = 15 + 2.03d
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    this is as far as i got

    d > 15/(5-2.03)
    d > 5.050505050505050505....

    Where is the range????
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    i got a slightly different equation:

    f = 14.6 + 2.16d

    the other equation is

    f = 5d

    so 14.6 + 2.16d > 5d

    d > 14.6/2.84

    the distance would then be anything greater than 100*14.6/2.84 km is cheaper with the first operator

    the bear
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    Haha! My god have AS levels become easier.
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    the bear
    your regression line is definitley wrong - my answer is from the mark scheme I just did not get the answer to the next bit!
    sorry
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    i noticed that it was different from yours.... i used an online calculator & typed in the numbers in the question...

    anyway the method is correct once you have the line sorted out

    the bear

    :train:
 
 
 
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