Scatterplots

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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.

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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.

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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.

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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

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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 general direction of the data points.

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CCSS.8.EE.B.5

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How can you determine the line of best fit?

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You can determine the line of best fit by using methods such as least squares regression, which minimizes the distance between the data points and the line.

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What is the purpose of using a scatterplot?

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The purpose of using a scatterplot is to visually display the relationship between two quantitative variables and to identify trends or patterns.

Tags

CCSS.8.SP.A.1

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What is an example of a positive correlation?

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An example of a positive correlation is the relationship between hours studied and exam scores; generally, more study time leads to higher scores.

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CCSS.HSS.ID.B.5

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What is an example of a negative correlation?

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An example of a negative correlation is the relationship between the amount of time spent watching TV and grades in school; more TV time often leads to lower grades.

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CCSS.HSS.ID.C.9

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What is the significance of outliers in a scatterplot?

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Outliers are data points that differ significantly from other observations. They can affect the line of best fit and may indicate variability in the data.

Tags

CCSS.8.SP.A.1