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    If I treat y1= equation (1)

    and I treated y0= equation (2)

    If I do (1)-(2)

    SURELY THE -Px/Py Cancel each other out???

    SO WTF
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    (Original post by APersonYo)
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    If I treat y1= equation (1)

    and I treated y0= equation (2)

    If I do (1)-(2)

    SURELY THE -Px/Py Cancel each other out???

    SO WTF
    Calculate the change by subtracting the first equation from the second. That gives:

    y_1-y_0=-\frac{p_x}{p_y}(x_1-x_0)

    \Delta y=y_1-y_0, \Delta x=x_1-x_0

    \therefore \Delta y=-\frac{p_x}{p_y}\Delta x
 
 
 
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