Results 1 to 3 of 3

Math Help - Eliminate the parameter

  1. #1
    Junior Member
    Joined
    Nov 2006
    Posts
    62

    Eliminate the parameter

    I am stuck and need a push. This problem looks simple, I have done quite a few of these but this one is a little different, it's giving me trouble. I am suppose to eliminate the parameter t to find a cartesian equation for:
    x = t^2
    y = 7 +1t
    x = Ay^2 + By + C

    Where:
    A =
    B =
    C =
    I was trying to solve for t as a function of Y and I thought I had it but no cigar. I am sure it is just that I have been sitting down for an hour and I need to walk away and come back to this because it seems to be easy but I just CAN'T!!!! Please HELP!
    Thank you,
    Keith Stevens
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie
    Joined
    Feb 2007
    From
    Tallahassee :(((((
    Posts
    4

    Hint

    Hey Keith. Try finding an expression for Y in terms of t, so you can substitute that into X = t^2.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Nov 2006
    Posts
    136
    so what you need to do is first use equation (2)

     y = 7 + 1t -> therefore t is  y - 7 = t

    then you substitute this into equation (1)

     x = (y-7)^2

    then equate this value of x to equation (3). They are bothe quadratic so compare the coefficients.

     (y-7)^2 = Ay^2 + By + C

     y^2 - 14y + 49 = Ay^2 + By + C

    compare the coefficients

    a = 1
    b = -14
    c = 49
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 5
    Last Post: December 24th 2011, 11:03 PM
  2. Eliminate the parameter..
    Posted in the Calculus Forum
    Replies: 2
    Last Post: April 15th 2010, 09:25 PM
  3. Replies: 2
    Last Post: August 31st 2009, 01:47 PM
  4. Eliminate the Parameter
    Posted in the Calculus Forum
    Replies: 1
    Last Post: January 19th 2009, 02:19 PM
  5. Eliminate the Parameter Problem
    Posted in the Calculus Forum
    Replies: 3
    Last Post: March 18th 2008, 12:23 PM

Search Tags


/mathhelpforum @mathhelpforum