Scatter Plots and Correlation

Front

What is a scatter plot?

Back

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

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CCSS.8.SP.A.1

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What does correlation mean in statistics?

Back

Correlation refers to a statistical measure that describes the extent to which two variables change together.

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CCSS.HSS.ID.C.9

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What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable.

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CCSS.HSS.ID.B.5

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What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable.

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CCSS.HSS.ID.B.5

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What does no correlation mean?

Back

No correlation means that there is no discernible relationship between the changes in two variables.

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CCSS.HSS.ID.B.5

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How do you interpret a scatter plot?

Back

To interpret a scatter plot, look for patterns, trends, and the direction of the relationship between the two variables.

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CCSS.8.SP.A.1

Front

What is the equation of a line in slope-intercept form?

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

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CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

What is the slope in a linear equation?

Back

The slope is a measure of the steepness of a line, representing the rate of change of the dependent variable with respect to the independent variable.

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CCSS.8.EE.B.5

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What does the y-intercept represent in a linear equation?

Back

The y-intercept represents the value of the dependent variable when the independent variable is zero.

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CCSS.HSF.LE.B.5

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How can you determine the slope from a scatter plot?

Back

The slope can be determined by selecting two points on the line of best fit and calculating the change in y over the change in x.

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CCSS.8.EE.B.5