Classifying Associations

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What is a scatterplot?

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A scatterplot 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 positive correlation indicate in a scatterplot?

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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 indicate in a scatterplot?

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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 is no correlation?

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

Tags

CCSS.8.EE.B.5

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How can you identify a positive correlation in a scatterplot?

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A positive correlation can be identified when the data points trend upwards from left to right.

Tags

CCSS.HSS.ID.B.5

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How can you identify a negative correlation in a scatterplot?

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A negative correlation can be identified when the data points trend downwards from left to right.

Tags

CCSS.HSS.ID.B.5

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What does it mean if a scatterplot shows a non-linear association?

Back

A non-linear association means that the relationship between the variables does not follow a straight line; it may curve or have a different pattern.

Tags

CCSS.HSS.ID.B.5

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What is the significance of the slope in a line of best fit?

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The slope indicates the rate of change between the two variables; a steeper slope means a stronger relationship.

Tags

CCSS.8.EE.B.5

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What is an example of a positive correlation in real life?

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

Tags

CCSS.HSS.ID.B.5