Results 1 to 2 of 2

Math Help - Tangent Prob.

  1. #1
    Newbie
    Joined
    Jun 2009
    Posts
    19

    Post Tangent Prob.

    Estimate the slope of the tangent line at P by averaging the slopes of two secant lines.
    P (15,250)
    Slope of two secant lines are -38.8 and -27.8


    The answer is -33.3. I cant seem to achieve this answer I keep getting -5.5, I am just adding both slopes and diving by 2.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Grandad's Avatar
    Joined
    Dec 2008
    From
    South Coast of England
    Posts
    2,570
    Thanks
    1
    Hello flutterby
    Quote Originally Posted by flutterby View Post
    Estimate the slope of the tangent line at P by averaging the slopes of two secant lines.
    P (15,250)
    Slope of two secant lines are -38.8 and -27.8


    The answer is -33.3. I cant seem to achieve this answer I keep getting -5.5, I am just adding both slopes and diving by 2.
    You're getting a sign wrong. When you add -38.8 and -27.8, the answer is -66.6, not -11.

    Grandad
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 1
    Last Post: September 27th 2011, 01:17 PM
  2. Replies: 2
    Last Post: April 12th 2011, 11:13 AM
  3. Replies: 6
    Last Post: January 12th 2011, 03:38 PM
  4. Tangent Line Prob 2
    Posted in the Calculus Forum
    Replies: 10
    Last Post: May 11th 2008, 09:58 PM
  5. tangent line prob
    Posted in the Calculus Forum
    Replies: 2
    Last Post: January 7th 2007, 04:15 PM

Search Tags


/mathhelpforum @mathhelpforum