Scatter Plots and Trend Lines

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What is a scatter plot?

Back

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

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CCSS.HSF-IF.C.7A

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What does a line of best fit represent in a scatter plot?

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A line of best fit is a straight line that best represents the data points in a scatter plot, indicating the general direction of the relationship between the variables.

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CCSS.8.EE.B.5

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How can you identify a linear relationship in a scatter plot?

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A linear relationship in a scatter plot is identified when the data points roughly form a straight line, either increasing or decreasing.

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CCSS.8.F.A.3

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What does it mean if a scatter plot has no correlation?

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If a scatter plot has no correlation, it means that there is no predictable pattern between the two variables, and the data points are scattered randomly.

Tags

CCSS.HSS.ID.B.5

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What is a trend line?

Back

A trend line is a line that is drawn on a scatter plot to represent the general direction of the data points.

Tags

CCSS.HSF-LE.A.1B

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How do you use a trend line to make predictions?

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You can use a trend line to make predictions by extending the line and finding the corresponding value on the other variable's axis.

Tags

CCSS.8.EE.B.5

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What is the purpose of the line of best fit?

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The purpose of the line of best fit is to summarize the relationship between the variables and to make predictions based on that relationship.

Tags

CCSS.8.EE.B.5

Front

What does a positive correlation look like in a scatter plot?

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A positive correlation in a scatter plot appears as data points that rise from left to right, indicating that as one variable increases, the other variable also increases.

Tags

CCSS.HSS.ID.B.5

Front

What does a negative correlation look like in a scatter plot?

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A negative correlation in a scatter plot appears as data points that fall from left to right, indicating that as one variable increases, the other variable decreases.

Tags

CCSS.HSS.ID.B.5

Front

What is the significance of outliers in a scatter plot?

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Outliers are data points that fall far away from the trend line and can significantly affect the slope and position of the line of best fit.