Line of Best Fit.

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Presentation transcript:

Line of Best Fit

Work with your group to make a prediction for the height at: Age (months) Height (cm) 18 76.1 19 77 20 78.1 21 22 78.8 23 79.7 24 25 81.1 26 81.2 27 82.8 28 29 83.5 Work with your group to make a prediction for the height at: • 21 months • 24 months • 28 years

Graph the data above.

What type of correlation do you see? positive negative no correlation What strength is the correlation? strong weak none ***Draw line of Best Fit***

Remember!!! A Line of Best is a straight line on a Scatter plot that comes closest to all of the dots on the graph. A Line of Best Fit does not touch all of the dots. A Line of Best Fit is useful because it allows us to: Understand the type and strength of the relationship between two sets of data Predict missing Y values for given X values, or missing X values for given Y values

Use your line of best fit to check your predictions in #1 above. 21 months - ____________inches 24 months - ____________ inches 28 months - ____________ inches

Use your line of best fit to check your predictions in #1 above. 21 months - ____________inches 24 months - ____________ inches 28 months - ____________ inches

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