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    mkd009's Avatar
    mkd009 Posts: 1, Reputation: 1
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    #1

    Sep 7, 2009, 09:14 AM
    x and y intercepts
    what are the x and y intercepts of (-4,5) and (6,0)

    what are the x and y intercepts of (3,7) and (-1,-5)
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Sep 7, 2009, 09:24 AM

    Work the equations of the line joining the points concerned.

    To do that, find the gradient between the two points, and use the formula for getting the equation of that line;





    Then, put x = 0 to have the y intercept, and y=0 to have the x intercept.

    I'll do the first one.

    (-4, 5) and (6, 0)

    Let (-4, 5) be (x1, y1) and (6, 0) be (x2, y2)



    Now, the formula to have the equation;

    here, you choose any of the two points;







    Now, I put x = 0 to have the y interept;





    Putting y=0,







    Now, try the second one.

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