Results 1 to 3 of 3

Math Help - Inverse Proportion

  1. #1
    Super Member
    Joined
    Dec 2009
    Posts
    755

    Inverse Proportion

    it is know that variable A is inversely proportional to the square of variable B. For a particular value of B, A is 64. When B is doubled, what happens to A?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Dec 2009
    Posts
    3,120
    Thanks
    1
    Quote Originally Posted by Punch View Post
    it is know that variable A is inversely proportional to the square of variable B. For a particular value of B, A is 64. When B is doubled, what happens to A?
    Hi Punch,

    write an inverse proportion relationship using fractions

    A=\frac{k}{B^2}

    64=\frac{k}{B^2}

    if B is doubled...

    \frac{k}{(2B)^2}=\frac{k}{2^2B^2}=\frac{1}{4}\ \frac{k}{B^2}

    hence A is quartered.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member
    Joined
    Dec 2009
    Posts
    755
    that was good, thanks
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Inverse proportion/Direct proportion question
    Posted in the Statistics Forum
    Replies: 3
    Last Post: September 26th 2011, 07:22 AM
  2. Inverse Proportion. explanation needed
    Posted in the Algebra Forum
    Replies: 3
    Last Post: June 6th 2011, 02:11 AM
  3. Inverse proportion
    Posted in the Algebra Forum
    Replies: 7
    Last Post: August 28th 2010, 08:39 PM
  4. Replies: 1
    Last Post: June 9th 2009, 03:52 PM
  5. inverse variation and proportion problems!!!
    Posted in the Algebra Forum
    Replies: 1
    Last Post: March 9th 2008, 08:23 PM

Search Tags


/mathhelpforum @mathhelpforum