Trend lines

Front

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

Front

How can a trend line be used to make predictions?

Back

A trend line can be extended to estimate values not directly measured in the data set, allowing predictions based on the established relationship.

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CCSS.HSF-LE.A.1B

Front

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

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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; changes in one do not affect the other.

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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, ranging from -1 to 1.

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CCSS.HSS.ID.C.8

Front

How do you interpret a correlation coefficient of 0.8?

Back

A correlation coefficient of 0.8 indicates a strong positive correlation between the two variables.

Tags

CCSS.HSS.ID.B.5

Front

What is the purpose of a scatter plot?

Back

A scatter plot visually represents the relationship between two quantitative variables, helping to identify trends or correlations.

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CCSS.8.SP.A.1

Front

If a trend line predicts 14 chapters for a book with 140 pages, what does this imply?

Back

It implies that based on the data, a book with 140 pages is expected to have approximately 14 chapters.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.

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CCSS.RI.7.7

CCSS.RI.8.7

CCSS.RL.7.7

CCSS.RL.8.7

CCSS.RL.9-10.7