Results 1 to 2 of 2

Math Help - Modelling temperatures

  1. #1
    Junior Member
    Joined
    Nov 2009
    Posts
    35

    Modelling temperatures

    the low temp in chicago is 25 degrees, occurs in january. x = 1(january)
    average high is 75 degrees which occurs in july. x=7(july)

    determine the constants so that the function f(x)=asin(b(x-c))+d models the data, where f(x) gives the temperature as a function of x.

    this is what I have:
    f(x) = -25sin(\frac{\pi}{6}x-1)+50
    it just doesn't look right to me. though, when i go to 2nd => calc => value, it gives me close to the exact values being off only by a hundred or less.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,623
    Thanks
    428
    Quote Originally Posted by qleeq View Post
    the low temp in chicago is 25 degrees, occurs in january. x = 1(january)
    average high is 75 degrees which occurs in july. x=7(july)

    determine the constants so that the function f(x)=asin(b(x-c))+d models the data, where f(x) gives the temperature as a function of x.

    this is what I have:
    f(x) = -25sin(\frac{\pi}{6}x-1)+50
    it just doesn't look right to me. though, when i go to 2nd => calc => value, it gives me close to the exact values being off only by a hundred or less.
    try this ...

    \displaystyle f(x) = -25\cos\left[\frac{\pi}{6}(x-1)\right]+50
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: April 29th 2011, 11:20 AM
  2. Modelling help!!!
    Posted in the Calculus Forum
    Replies: 7
    Last Post: January 19th 2011, 04:19 PM
  3. odds for predicting temperatures
    Posted in the Statistics Forum
    Replies: 2
    Last Post: August 27th 2010, 11:11 PM
  4. Modelling
    Posted in the Advanced Applied Math Forum
    Replies: 5
    Last Post: May 14th 2009, 12:17 PM
  5. Replies: 2
    Last Post: May 3rd 2009, 06:12 AM

Search Tags


/mathhelpforum @mathhelpforum