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Thread: X & Y proportional scale

  1. #1

    X & Y proportional scale

    Hi everyone,

    I'm new here so thanks in advance for reading and any help you may give.

    So I am trying to plot points in a rectangle. I am given an X and Y value that is 0,0 if its in the centre of the rectangle. if its Y position is -750 its at the top and 750 if its at the bottom.
    I am trying to plot it onto a chart but a calculation is needed. On my chart the Y centre is also 0, but the top is position 0.967 and bottom is -0.967

    So in essence

    Y top = -750 and 0.967
    y bottom = 750 and -0.967
    y middle = 0 and 0

    What would be the calculation for instance if I got given a y value of -400

    Thanks

  2. #2
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    Quote Originally Posted by StudentD View Post
    So I am trying to plot points in a rectangle. I am given an X and Y value that is 0,0 if its in the centre of the rectangle. if its Y position is -750 its at the top and 750 if its at the bottom.
    I am trying to plot it onto a chart but a calculation is needed. On my chart the Y centre is also 0, but the top is position 0.967 and bottom is -0.967

    So in essence

    Y top = -750 and 0.967
    y bottom = 750 and -0.967
    y middle = 0 and 0

    What would be the calculation for instance if I got given a y value of -400
    I imagine this is a graphic programming problem, where the vertical axis is taken to be oriented downward.

    As you say, the distance is proportional to the coordinate. So their ratio is d/y = 0.967/-750. Just solve the proportion to find d when y = -400 or whatever.

    Please show your work if you want further help.

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