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Point moving along the curve y=2x^2+1

  1. Oct 12, 2005 #1
    A point moves along the curve y=2x^2+1 in such a way that the y value is decreasing at the rate of 2 units per second. At what rate is x changing when x=(3/2)?
  2. jcsd
  3. Oct 12, 2005 #2
    What have you done so far? Do you know anything about related rates? Start by differentiating, then use the fact that:


    Try writing the info. given in terms of derivatives.

  4. Oct 12, 2005 #3


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    What is the given and what is the unknown? From the problem statement, you know that y and x are also functions of t.
    Show what you got so far.
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