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Math Help - linear equation

  1. #1
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    linear equation

    A line passing through the origin has slope −1. Determine the value of a, if the line is to contain the point (a, −1).



    can someone help me please?
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  2. #2
    MHF Contributor

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    Any (non-vertical) line can be written in the form y= mx+ b where m is the slope and b is the "y-intercept"- the y value of the point where the line crosses the y- axis. You are given both of those. Once you have written the correct formula, put y= -1 and solve for x.
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