Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Line of Best Fit?

  1. Sep 25, 2007 #1
    1. I need to know where the Y intercept would be on a linear equation with a slope of 4 and the intercepts (-22,101) and (-12,141).

    I also need to know how to find the line of best fit on a calculator

    I think the Y-int may be 189, but I don't really have any idea how to do either of these but am pretty sure I need a calculator for both.
  2. jcsd
  3. Sep 25, 2007 #2


    User Avatar
    Homework Helper
    Education Advisor
    Gold Member

    We have three different ways to express a linear equation. Which you choose really not matters. For simple common use, try slope-intercept form: y=mx+b;

    You know that m=4; so just plug in any point's coordinates and find the value for b. You can then, if you wish, convert into (forgot the name for the form) Ax+By=C form because this form can assist you more easily in finding the x-axis and y-axis intercepts. Simple Algebra Skills.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook