Scatterplots Review

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What is a scatterplot?

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A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

Tags

CCSS.8.SP.A.1

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What does a positive correlation in a scatterplot indicate?

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

Tags

CCSS.HSS.ID.B.5

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What does a negative correlation in a scatterplot indicate?

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A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Tags

CCSS.HSS.ID.B.5

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What does no correlation mean in a scatterplot?

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No correlation means there is no apparent relationship between the two variables; changes in one variable do not predict changes in the other.

Tags

CCSS.HSS.ID.B.5

Front

What is a line of best fit?

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A line of best fit is a straight line that best represents the data on a scatterplot, showing the trend of the data.

Tags

CCSS.8.EE.B.5

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How can you determine the strength of a correlation from a scatterplot?

Back

The strength of a correlation can be determined by how closely the points cluster around the line of best fit; tighter clusters indicate stronger correlations.

Tags

CCSS.HSS.ID.B.5

Front

What is the purpose of using a scatterplot?

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Scatterplots are used to visually assess the relationship between two quantitative variables.

Tags

CCSS.8.SP.A.1

Front

What does it mean if the points on a scatterplot are widely spread out?

Back

If the points are widely spread out, it suggests a weak correlation between the variables.

Tags

CCSS.HSS.ID.B.5

Front

How do you identify a linear relationship in a scatterplot?

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A linear relationship is identified when the points on the scatterplot form a pattern that can be approximated by a straight line.

Tags

CCSS.8.F.A.3

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What is the significance of outliers in a scatterplot?

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Outliers are points that fall far from the trend of the data; they can significantly affect the line of best fit and the correlation.