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Math Help - Equation of a line which is parallel

  1. #1
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    Post Equation of a line which is parallel

    I know it sounds funny but please help i got headache from this equation even thou i know its easy.

    Write down the equation of a line which is
    a) parallel to y=4x+2, and passes through 4 on the y- axis
    b) parallel to y=10x -5, passes through -1 on the y-axis


    Thanks For The Help In Advance
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  2. #2
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    Write down the equation of a line which is
    a) parallel to y=4x+2, and passes through 4 on the y- axis
    b) parallel to y=10x -5, passes through -1 on the y-axis[/QUOTE]
    the equation of a line which is
    a) parallel to y=mx+b, and passes through c on the y-axis is y=mx+c.
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  3. #3
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    Quote Originally Posted by MrGenuouse View Post

    a) parallel to y=4x+2, and passes through 4 on the y- axis
    Headaches are bad so i'll help you out with the first question and you can apply the same method to the second.

    We seek a line in the form of y=mx+c . We need to find m (the gradient) and c (the y-intercept) .

    The gradient in the given equation is m= 4 and as the line we are after is parallel we can simply substitute this value into the new line giving

    y=4x+c

    Now passing through 4 on the y-axis means the y-intercept is 4 so we can substitute that in for c and we are finished

    y=4x+4

    How easy was that?
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  4. #4
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    Thank You Very much for your help! My headache is over so I am really thankful about that too!

    i hope i will be able to gain more knowledge from this community as i am 16 years old boy who is really interested in maths.
    Last edited by mr fantastic; July 13th 2010 at 03:39 AM. Reason: Tagged question moved to a new thread.
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