Presentation is loading. Please wait.

# Line of Best Fit. Age (months) Height (inches) 1876.1 1977 2078.1 21 2278.8 2379.7 2479.9 2581.1 2681.2 2782.8 28 2983.5 Work with your group to make.

## Presentation on theme: "Line of Best Fit. Age (months) Height (inches) 1876.1 1977 2078.1 21 2278.8 2379.7 2479.9 2581.1 2681.2 2782.8 28 2983.5 Work with your group to make."— Presentation transcript:

Line of Best Fit

Age (months) Height (inches) 1876.1 1977 2078.1 21 2278.8 2379.7 2479.9 2581.1 2681.2 2782.8 28 2983.5 Work with your group to make a prediction for the height at: 21 months 28 months 20 years

Line of Best Fit Definition - A Line of Best is a straight line on a Scatterplot 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

Equation For Line of Best Fit y = 0.6618x + 64.399 X (months)FormulaY (inches) 21 0.6618(21) + 64.399 28 0.6618(28) + 64.399 240 0.6618(240) + 64.399 78.3 82.9 223.3

Predicting Data with Scatterplots Interpretation - Making a prediction for an unknown Y value based on a given X value within a range of known data Extrapolation - Making a prediction for an unknown Y value based on a given X value outside of a range of known data More accurate: Interpretation Less accurate: Extrapolation

Download ppt "Line of Best Fit. Age (months) Height (inches) 1876.1 1977 2078.1 21 2278.8 2379.7 2479.9 2581.1 2681.2 2782.8 28 2983.5 Work with your group to make."

Similar presentations

Ads by Google