Scatter Plots and Lines of Best Fit

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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.

Tags

CCSS.8.SP.A.1

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What does a positive correlation indicate in a scatter plot?

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A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Tags

CCSS.HSS.ID.B.5

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What does a negative correlation indicate in a scatter plot?

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A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Tags

CCSS.HSS.ID.B.5

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What is an outlier in a scatter plot?

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An outlier is a data point that is significantly different from other data points in the scatter plot, often lying far away from the trend.

Tags

CCSS.8.SP.A.1

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What is the line of best fit?

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The line of best fit is a straight line that best represents the data on a scatter plot, showing the overall trend of the data.

Tags

CCSS.8.EE.B.5

Front

How can you identify the line of best fit?

Back

The line of best fit can be identified by visually assessing which line minimizes the distance between itself and all the data points.

Tags

CCSS.8.EE.B.5

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What does it mean if there is no correlation in a scatter plot?

Back

No correlation means that there is no apparent relationship between the two variables; changes in one variable do not predict changes in the other.

Tags

CCSS.HSS.ID.B.5

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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 axis for a given input.

Tags

CCSS.8.EE.B.5

Front

What is the purpose of analyzing scatter plots?

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The purpose of analyzing scatter plots is to understand the relationship between two variables and to identify trends, patterns, or anomalies.

Tags

CCSS.HSS.ID.B.5

Front

What is the significance of the slope of the line of best fit?

Back

The slope of the line of best fit indicates the rate of change between the two variables; a steeper slope means a stronger relationship.

Tags

CCSS.8.EE.B.5