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Small Graphing Question

  1. Nov 12, 2007 #1
    1. The problem statement, all variables and given/known data

    I have a question for a graph where I'm basically trying to find the acceleration using a table which has a time squared value starting at 7.132 seconds squared and ending at 9.686 seconds squared. I need to find a regression (I need to find the slope for the line of best fit. This is the graph:

    The first problem is the error bars. I got y error bars but when I click on format options for the excel graph, it doesn't show x bars options so how do I add error bars? And my other question is, how/should I add (0,0) to the graph because obviously the displacement is 0 m at 0 seconds but this wasn't conducted in the experiment so wouldn't it skew the slope of the line of best fit?

    2. Relevant equations

    Here's the relation:
    y= mx + b --------> s(displacement) = 1/2 a(acceleration)*t^2(seconds squared)

    and here's the table:


    3. The attempt at a solution

  2. jcsd
  3. Nov 13, 2007 #2
    Should I set 7.132 to be the x intercept?
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