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Math Help - Slope problems,

  1. #1
    Senior Member vaironxxrd's Avatar
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    Post Slope problems,

    Ok so im a junior in high school and last year i failed geometry i don't want to be on the same path this year ETC...

    Im doing slope stuff and i got different questions about this.

    i understand that the equation is Y=Mx(slope)+B(Y,Intercept)

    First question , When They give me For example
    Point A (X1,Y1) point B (X2,Y2) i also know i have to do either Y1-Y2/X1-X2
    I also heard i can do Y2-Y1/X2-X1 is this truth? cause Y2-Y1 is the form i use
    when doing the equation i have problems because I get confuse With Y, and Y-intercept if for example i chose point B, (X2,Y2) X2 is going to be X? for multiplying the slope and Y2 is going to be The (Y=) ? or (Y-intercept).

    Another thing i got a problem which is very confusing says Line S has equation Y=-1/3X-1. Line T is parallel to line S andpasses through pont (3,2). write an equation for line T. how can i do this? is it just going to be fliping it and making the slope (-1/3x) which is a fraction. Positive? Like making it (3/1x)?
    Last edited by vaironxxrd; November 22nd 2010 at 09:33 AM. Reason: accidently pressed Enter
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  2. #2
    MHF Contributor
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    Quote Originally Posted by vaironxxrd View Post
    i understand that the equation is Y=Mx(slope)+B(Y,Intercept)
    Not quite: y = M(slope)x + B(Y-intercept).


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  3. #3
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    slope problems

    Hi vaironxxd,
    Parallel lines have the same slopes but different y intercepts
    the slope of the line required = 1/3
    use the point slope formula to find the new line point is (3,2)
    y-2/x-3 = 1/3
    y =1/3x+1
    plot the new line


    bjh
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