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Cartesian Equation question Watch

1. Can someone help me with this question? I'm not sure whether there are other steps i need to take or not

Find the values of the parameters and the other co-ordinates of the given points on this curve:
x=at^2 and y=2at where x=9a/4

Ive already rearranged the second equation and made it equal to x, and then subbed it into the first equation to get 4ax=y^2
I then rearranged the 3rd equation to get 4x/9=a and subbed it into 4ax=y^2 which gave me 16x^2=9y^2

Do i need to draw any graphs? is that even right?also unfortunately i can't take any pictures of my working out as my phone is broken
2. (Original post by Carokelly123)
Can someone help me with this question? I'm not sure whether there are other steps i need to take or not

Find the values of the parameters and the other co-ordinates of the given points on this curve:
x=at^2 and y=2at where x=9a/4

Ive already rearranged the second equation and made it equal to x, and then subbed it into the first equation to get 4ax=y^2
I then rearranged the 3rd equation to get 4x/9=a and subbed it into 4ax=y^2 which gave me 16x^2=9y^2

Do i need to draw any graphs? is that even right?also unfortunately i can't take any pictures of my working out as my phone is broken

You're making this too complicated

If x = at^2 and x = 9a/4, what value(s) can the parameter t take? And then what are the corresponding value(s) of y?
3. (Original post by davros)
You're making this too complicated

If x = at^2 and x = 9a/4, what value(s) can the parameter t take? And then what are the corresponding value(s) of y?
lol did i even get the right answer?

Updated: October 12, 2016
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