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Graph matching

  1. Nov 26, 2009 #1
    1. The problem statement, all variables and given/known data
    http://img121.imageshack.us/img121/8907/graphr.jpg [Broken]


    2. Relevant equations



    3. The attempt at a solution
    i cant believe i got this wrong.. i even checked the textbook for that and still got it wrong :/
    B,C,D,E are 100% correct.
    the other 2 i logically matched them..
    increment of x obviously gonna be F
    and the tangent line, or the differentiable of y is A
    so whats wrong?
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Nov 26, 2009 #2

    Mark44

    Staff: Mentor

    dy and Differential of y are the same thing.

    A is the line, whose equation would be y - y0 = f'(x0)(x - x0), where (x0, y0) is the point where the line is tangent to the curve, and f'(x0) is the slope of the tangent line. Other notation for f'(x0) is [tex]\frac{dy}{dx}|_{x = x_0}[/tex].
     
  4. Nov 26, 2009 #3
    oh i didnt know i can use the same answer twice.. i was thinking that too but then i thought it would be wrong with 2 of the same answers..

    thanks man
     
  5. Nov 26, 2009 #4

    Mark44

    Staff: Mentor

    I think they got tricky on you.
     
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