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Math Help - Distance and Direction

  1. #1
    Newbie
    Joined
    Aug 2011
    Posts
    5

    Distance and Direction

    Hi

    I am stuck with a sheet I got from school and i dont understand what the question means. Ive attached a picture of the street/houses and hope one of you guys could figure out the answer to the last 2 questions

    1. Find a Rule for the numbers of two houses if one house is due south of the other house

    2. Find a rule for the numbers of two houses if one house is due north-west of the other house.

    Any Ideas ?

    Help Needed

    Thanks
    Attached Thumbnails Attached Thumbnails Distance and Direction-photo_00005.jpg  
    Last edited by mr fantastic; November 24th 2011 at 12:49 PM. Reason: Title.
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  2. #2
    Junior Member
    Joined
    Jun 2011
    Posts
    56

    Re: Maths Help Needed - Distance and Direction

    Step 1: determine which information is relevant for the subquestion (and which information is not). Houses 13 through 18 are not directly south of any other house, so you can ignore these houses for the first subqestion, we're only interested here in houses 1 through 12.

    Step 2: identify the variables. For the first subquestion there are two variables: the number of a northern house and the number of its opposing southern house. Let's call the number of a northern house x_N, and the number of its opposing southern house x_S

    Step 3: make a formula that links the the two house numbers. In this case a simple linear formula will do:
    x_n=a+bx_s
    I'll leave it up to you to figure out the values for constants a and b

    Then repeat the same steps for the second subquestion.
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