Linear Regression

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What is Linear Regression?

Back

A statistical method used to model the relationship between a dependent variable and one or more independent variables.

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What does a correlation coefficient (r) of -0.89 indicate?

Back

Strong negative correlation.

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CCSS.HSS.ID.B.5

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What is a scatter plot?

Back

A graphical representation showing the relationship between two quantitative variables.

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What does a positive correlation mean?

Back

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 mean?

Back

As one variable increases, the other variable decreases.

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CCSS.HSS.ID.B.5

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What is the purpose of a trend line in a scatter plot?

Back

To show the general direction of the data points and to help make predictions.

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CCSS.HSF-LE.A.1B

Front

What does a correlation coefficient (r) of 0 indicate?

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No correlation between the variables.

Tags

CCSS.HSS.ID.B.5

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How can you predict values using a trend line?

Back

By extending the trend line to estimate the value of the dependent variable for a given independent variable.

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What is the difference between strong and weak correlation?

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Strong correlation means the data points are close to the trend line, while weak correlation means they are more spread out.

Tags

CCSS.HSS.ID.B.5

Front

What is the formula for a simple linear regression line?

Back

y = mx + b, where m is the slope and b is the y-intercept.

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CCSS.8.EE.B.5