Best Fit Lines

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Best Fit Lines

• Applied Math 2
• 10/19/2007

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Using a Best Fit Line
A best fit line is
Sometimes it is called a
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Using a Best Fit Line

• This is an example of a best fit line

A Best-Fit line
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Using a Best Fit Line

• If your numbers go up along the y axis as they
  get bigger along the x axis it is

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Using a Best Fit Line

• If your numbers go down along the y axis as they
  get bigger along the x axis it is

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Using a Best Fit Line

• If your numbers dont follow along a line there
  is

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Using a Best Fit Line

• The closer to the Best Fit line all the points
  fall the the correlation, further away
  is correlation

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To Draw a Best Fit line.

• Use your eye to make a straight line through the
  middle of the data.

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To Draw a Best Fit line.

• Make A best fit line and tell what kind of
  correlation it is

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To Draw a Best Fit line.

• Make A best fit line and tell what kind of
  correlation it is

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To Draw a Best Fit line.

• Make A best fit line and tell what kind of
  correlation it is

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To Draw a Best Fit line.

• Make A best fit line and tell what kind of
  correlation it is

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To Draw a Best Fit line.

• Make A best fit line and tell what kind of
  correlation it is

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To Draw a Best Fit line.

• Excel can use equations to make a perfect best
  fit line
• Step 1 make a scatter plot in Excel
• Step 2 right click on a data point and select add
  trend line
• Step 3 select ok a best fit line will appear

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To Draw a Best Fit line.

• In Excel make a scatter plot with a trend line
  for these and tell what kind of correlation it
  is.