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Math Help - Calculating an x,y intercept point

  1. #1
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    Calculating an x,y intercept point

    I need to know how to calculate the values for mx and my for the attached image. I am a novice. Any help would be appreciated.
    Attached Thumbnails Attached Thumbnails Calculating an x,y intercept point-xypoints.gif  
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  2. #2
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    Quote Originally Posted by questforknowledge004 View Post
    I need to know how to calculate the values for mx and my for the attached image. I am a novice. Any help would be appreciated.

    mx = 150
    my = 150

    Do you need to see all of the work involved (Equation of a line, Slope, ect.)?
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  3. #3
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    Yes. Please, I need to see all of the work. All of the calcuations involved. I am a novice.

    Thanks
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  4. #4
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    Re:

    RE:

    Part #1
    Attached Thumbnails Attached Thumbnails Calculating an x,y intercept point-42.jpg  
    Last edited by qbkr21; June 14th 2007 at 08:25 PM.
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    Re:

    RE:

    Part #2




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  6. #6
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    The more analytic way of doing this once you get the two eqautions follows.

    We have the equations of the two lines from qbkr21:
    y = x
    y = -x + 300

    These lines have different slopes and will thus intersect at a point. The point satisfies BOTH line equations. So the two x values in the two equations are the same and the two y values in the two equations are the same. So since y = y...

    x = -x + 300

    2x = 300

    x = 150

    We can now substitute this x value into either line equation and find that
    y = 150

    So the coordinates of your point of intersection is (x, y) = (150, 150)

    -Dan
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