Scatter Plots and Trend Lines

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What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

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CCSS.8.SP.A.1

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What does a negative correlation in a scatter plot indicate?

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A negative correlation indicates that as one variable increases, the other variable decreases.

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CCSS.HSS.ID.B.5

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What does a positive correlation in a scatter plot indicate?

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A positive correlation indicates that as one variable increases, the other variable also increases.

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CCSS.HSS.ID.B.5

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What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, used to make predictions.

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CCSS.8.SP.A.2

Front

What is the purpose of analyzing scatter plots?

Back

The purpose is to identify relationships between variables, such as correlation and trends.

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CCSS.HSS.ID.B.5

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What does 'no correlation' mean in a scatter plot?

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No correlation means there is no discernible relationship between the two variables; changes in one do not affect the other.

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CCSS.HSS.ID.B.5

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How can you determine the strength of a correlation in a scatter plot?

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The strength of a correlation can be determined by how closely the data points cluster around the line of best fit.

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CCSS.HSS.ID.B.5

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What is an example of a positive association?

Back

An example of a positive association is the relationship between the number of hours studied and test scores.

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CCSS.HSS.ID.B.5

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What is an example of a negative association?

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An example of a negative association is the relationship between the amount of gas in a tank and the distance a car can travel.

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CCSS.HSF-LE.A.1B

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What does it mean if a scatter plot shows a cluster of points?

Back

A cluster of points indicates that there is a strong relationship between the two variables in that area.

Tags

CCSS.8.SP.A.1