anonymous
  • anonymous
how do you find the equation of a line of best fit? please help!!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Do you have a graph?
anonymous
  • anonymous
yes
anonymous
  • anonymous
Exactly what do you need help with?

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anonymous
  • anonymous
i dont know what steps to do in order to find the equation of the line of best fit
anonymous
  • anonymous
look for the y-intercept first. If the equation is in the form y=mx+b, b is the y-intercept, which is the point the line crosses the graph
anonymous
  • anonymous
-5.4
anonymous
  • anonymous
Next look for the slope, m, which is \[\frac{y2-y1}{x2-x1}\]
anonymous
  • anonymous
do i get 2 ploted points?
anonymous
  • anonymous
If you have plotted points, then you can substitute them into that equation for slope
anonymous
  • anonymous
after that do i just plug the slope and the y-intercept into the equation?
anonymous
  • anonymous
if you know the slope and the y-intercept, you can identify the graph
anonymous
  • anonymous
ok thank you so much
anonymous
  • anonymous
np
anonymous
  • anonymous
:)
amistre64
  • amistre64
the mean of your xs and the mean of your ys will be a point on the line of best fit \[(\bar x,\bar y)\] is on the line so we just need to determine a good slope to use
amistre64
  • amistre64
i cant recall how the average slope is obtained; personally I just use excel to calculate the slopes and pick the average fromthe interquartile range ..... but thats not "proper" :)

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