Trend lines

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What is a trend line?

Back

A trend line is a straight line that best represents the data on a scatter plot, showing the general direction of the data points.

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CCSS.HSF-LE.A.1B

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What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

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CCSS.HSS.ID.B.5

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What is a line of best fit used for?

Back

A line of best fit is used to make predictions based on the data.

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CCSS.8.EE.B.5

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What does a positive correlation indicate?

Back

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

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CCSS.HSS.ID.B.5

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What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure of the strength and direction of a relationship between two variables.

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CCSS.HSS.ID.C.8

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How do you determine the line of best fit on a graph?

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The line of best fit is determined by visually assessing the data points and drawing a line that minimizes the distance from all points.

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What is the purpose of using trend lines in data analysis?

Back

Trend lines help to identify patterns, make predictions, and understand relationships between variables.

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CCSS.8.SP.A.2

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What does it mean if there is no correlation between two variables?

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

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CCSS.HSS.ID.B.5

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How can you visually identify a negative correlation on a graph?

Back

A negative correlation can be visually identified by a downward slope from left to right on the graph.

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CCSS.HSS.ID.B.5

Front

What is an example of a situation with a positive correlation?

Back

An example of a positive correlation is the relationship between hours studied and test scores; as study time increases, test scores tend to increase.

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CCSS.HSS.ID.B.5