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Math Help - Y-intercept form

  1. #1
    Austin467
    Guest

    Y-intercept form

    AAAAAA!!!!! I havnt done homework in a long time, and i just got sent home a take-home test on y-intercept form. An explanation would be nice, as well as answering this purely example question:

    y = 2x + 4

    just convert it into y-intercept, i learn by example.
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  2. #2
    Junior Member cinder's Avatar
    Joined
    Feb 2006
    Posts
    60
    It's been a while since I've done algebra, but that's in y-intercept form, isn't it (also called slope-intercept)??

    y=mx+b, where m is your slope, and b is the y-intercept (that is, where the line crosses the y-axis).

    So in your equation, the slope is 2 (or \frac{2}{1}, same thing, just remember \frac{rise}{run}) and the y-intercept is 4.

    Also, I attached a graph with my notes in red. Does this help at all, or did I not understand your question?
    Attached Thumbnails Attached Thumbnails Y-intercept form-y-2x-4.gif  
    Last edited by cinder; April 25th 2006 at 11:28 PM.
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