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Math Help - [SOLVED] formula for slope?

  1. #1
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    [SOLVED] formula for slope?

    Hi for a slope equation what is the difference between y=mx+b+c and y=mx+b? what does the constant c stand for?

    And also, if the slope passes through the origin what characteristics does it have? and what is the equation (or formula) for it?


    THanks in advance!!!
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  2. #2
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    In the line equation y = mx + b, m is the slope, and b is the y-intercept. If the equation were written y = mx + b + c, then the y-intercept would be b + c, but this equation is not simplified. If the line passes through the origin, then its y-intercept is 0, and its equation is y = mx.
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  3. #3
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    Perhaps the c came from the point-slope formula, although I've never seen it written like that.

    (y-y_0)=m(x-x_0)

    y=mx-(mx_0)+y_0

    ------------
    If y=mx+b is your line equation, m is the slope and b is the y-intercept. If it passes through the origin, what's the y-intercept? Zero. So the line is simply y=mx.
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  4. #4
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    The equation of a line whose slope goes through the origin (and is linear) and is in the form y=mx+b would be y=mx because the y-intercept is zero.
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  5. #5
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    Thanks to icemanfan, Jameson and dolphinlover!!
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