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 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 does a negative correlation indicate?

Back

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

Tags

CCSS.HSS.ID.B.5

Front

What is the purpose of a line of best fit?

Back

The purpose of a line of best fit is to make predictions based on the data represented in a scatter plot.

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CCSS.8.EE.B.5

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

Back

No correlation means that there is no predictable relationship between the two variables.

Tags

CCSS.HSS.ID.B.5

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How can you identify a positive correlation on a scatter plot?

Back

A positive correlation can be identified by a pattern where points slope upwards from left to right.

Tags

CCSS.HSS.ID.B.5

Front

How can you identify a negative correlation on a scatter plot?

Back

A negative correlation can be identified by a pattern where points slope downwards from left to right.

Tags

CCSS.HSS.ID.B.5

Front

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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What does a correlation coefficient of 1 indicate?

Back

A correlation coefficient of 1 indicates a perfect positive correlation.

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CCSS.HSS.ID.B.5

Front

What does a correlation coefficient of -1 indicate?

Back

A correlation coefficient of -1 indicates a perfect negative correlation.

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CCSS.HSS.ID.B.5