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Interpreting Graphs

  1. Sep 20, 2005 #1
    Suppose you recorded the following data below during your study of the relationship of forces to acceleration. Plot the graph.

    Force (N) | Acceleration (m/s^2)

    10 | 6.0
    20 | 12.5
    30 | 19.0
    40 | 25.0

    This is where i'm having problems: Write an equation for the line. (Recall that slope = change of y over change of x.)
    Last edited: Sep 20, 2005
  2. jcsd
  3. Sep 22, 2005 #2

    Tom Mattson

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    Gold Member

    Well, since the "rise" over the "run" for each consecutive pair of points is not constant, you'll have to do a curve fit. For linear curves that is done by linear regression.

    Here is a brief tutorial:


    Check it out, and come back with any questions you have.
  4. Sep 22, 2005 #3


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    This is a duplicate thread. See post
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