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Homework Help: Equation of y vs x

  1. Nov 2, 2004 #1

    what is equation of the graph of y vs x?

    I lost all my data for this physics project and all I have left are these notations. I would be able to find an equation if I had my graph. Any help would be appreciated.

  2. jcsd
  3. Nov 2, 2004 #2


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    those are parametric equations isolate t, then substitute in the other, and graph it.
  4. Nov 2, 2004 #3
    I didn't catch that, can you explain it in more detail?
  5. Nov 2, 2004 #4
    I think he means that find t in term of x and subsitute the t into the second equation of yours.
  6. Nov 2, 2004 #5


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    sorry, i was away, yes what leong said.
  7. Nov 2, 2004 #6
    ahh...so it's similar to a system of equations
  8. Nov 3, 2004 #7
    Urban, the graph of the equations would be a parabola. I'm not real good at math but I think you can graph the equation by substituting values for t in both equations and evaluating to get the x and y points for each value of t. For instance, for t=0, x=0.181 and y=0.455 ... for t=1, x=4.461 and y=11.435 ... for t=2, x=8.741 and y=35.355 and so on for as many + and - values of t as you need. Plot the points and connect them as a smooth curve.
  9. Nov 3, 2004 #8


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    Yes, but that's irrelevant to the question asked.
  10. Nov 6, 2004 #9
    Well, Ivy, I don't believe it is irrelevant. Urban did say the equation could be found with the graph and any help would be appreciated.
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