1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Finding the slope and intercept of a graph

  1. Nov 22, 2009 #1
    1. The problem statement, all variables and given/known data
    I am given the formula A = Bt / (3d2)

    d is what we changed, A is what was measured.

    I had to plot ln(A) vs ln(3d2).

    What do the slope and intercept of this graph represent?

    2. Relevant equations



    3. The attempt at a solution
    ln (A) = ln (Bt / 3d2) = ln(Bt) - ln(3d2)

    ln (A) / ln (3d2) = ln (Bt)/ln(3d2) - 1

    After this I get stuck. Help please!
     
  2. jcsd
  3. Nov 22, 2009 #2

    Redbelly98

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    If you are plotting ln(A) vs. ln(3d2), then let

    x = ln(3d2)
    y = ln(A)​

    and you are now plotting y vs. x.

    Write your equation,

    ln (A) = ln(Bt) - ln(3d2),​

    in terms of x and y. The slope and intercept should become easier to identify.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook