Scatterplots and Trendlines

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What is a scatterplot?

Back

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 association in a scatterplot indicate?

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A positive association 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 association in a scatterplot indicate?

Back

A negative association 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 association in a scatterplot?

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No association means that 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 trendline?

Back

A trendline is a line that is drawn on a scatterplot to show the general direction of the data points.

Tags

CCSS.8.EE.B.5

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What does a linear association look like on a scatterplot?

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A linear association appears as a straight line, indicating a consistent relationship between the two variables.

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CCSS.8.F.A.3

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What is a non-linear association?

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A non-linear association occurs when the relationship between the variables does not follow a straight line, often curving or changing direction.

Tags

CCSS.HSS.ID.B.5

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What is correlation?

Back

Correlation is a statistical measure that describes the extent to which two variables change together.

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CCSS.HSS.ID.C.9

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What is a correlation coefficient?

Back

The correlation coefficient is a numerical value that ranges from -1 to 1, indicating the strength and direction of a linear relationship between two variables.

Tags

CCSS.HSS.ID.B.5

Front

What does a correlation coefficient of -1 indicate?

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A correlation coefficient of -1 indicates a perfect negative linear relationship between two variables.

Tags

CCSS.HSS.ID.B.5