Results 1 to 2 of 2

Math Help - Cartesian Equation

  1. #1
    Member
    Joined
    Oct 2007
    Posts
    178

    Cartesian Equation

    x= 3t
    y= 9t^2

    Find the cartesian equation.
    I don't get what one is.

    The answer is t^2.


    thanks!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member wingless's Avatar
    Joined
    Dec 2007
    From
    Istanbul
    Posts
    585
    Quote Originally Posted by Truthbetold View Post
    x= 3t
    [tex]
    The answer is t^2.
    t^2 is not a cartesian equation. It's not even an equation..

    As far as I know, cartesian equations are equations that describe the curve using x and y coordinates, not parameters like t.

    x = 3t
    y = 9t^2
    You can see that y = x^2.

    If you can't see the relation between x and y (parametric equations are not always simple like this), you can do it algebraically.

    x = 3t
    t = \frac{x}{3}
    y = 9t^2
    y = 9 (\frac{x}{3})^2
    y = x^2
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Cartesian equation
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: April 6th 2010, 08:58 PM
  2. equation of cartesian
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: January 17th 2010, 01:11 PM
  3. Replies: 4
    Last Post: December 1st 2009, 03:45 PM
  4. Cartesian equation.
    Posted in the Calculus Forum
    Replies: 1
    Last Post: August 9th 2009, 05:35 PM
  5. Replies: 4
    Last Post: August 21st 2008, 07:02 AM

Search Tags


/mathhelpforum @mathhelpforum