Scatterplots and trend lines review

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What is a scatterplot?

Back

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

Tags

CCSS.8.SP.A.1

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What is a trend line?

Back

A trend line is a straight line that best represents the data on a scatterplot, indicating the general direction of the data points.

Tags

CCSS.HSF-LE.A.1B

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How do you interpret a positive correlation in a scatterplot?

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

Tags

CCSS.HSS.ID.B.5

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How do you interpret a negative correlation in a scatterplot?

Back

A negative correlation means 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 the line of best fit?

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The line of best fit is the trend line that minimizes the distance between itself and all the data points in a scatterplot.

Tags

CCSS.8.EE.B.5

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How can you use a trend line to make predictions?

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You can use a trend line to predict the value of one variable based on the value of another by finding the corresponding point on the line.

Tags

CCSS.8.EE.B.5

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What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two variables, helping to identify trends, correlations, and outliers.

Tags

CCSS.8.SP.A.1

Front

What is an example of a positive correlation?

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

Tags

CCSS.HSS.ID.B.5

Front

What is an example of a negative correlation?

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An example of a negative correlation is the relationship between outside temperature and the number of layers of clothing worn; as temperature increases, layers worn typically decrease.

Tags

CCSS.HSS.ID.B.5