Scatter Plots and Correlations

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What is a scatter plot?

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

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CCSS.8.SP.A.1

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What does correlation mean in statistics?

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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 are the types of correlation?

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The types of correlation are positive correlation, negative correlation, and no correlation.

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CCSS.HSS.ID.C.9

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What is a positive correlation?

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A positive correlation means that as one variable increases, the other variable also increases.

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CCSS.HSS.ID.B.5

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What is a negative correlation?

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A negative correlation means that as one variable increases, the other variable decreases.

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CCSS.HSS.ID.B.5

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What does no correlation mean?

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No correlation means that there is no predictable relationship between the two variables.

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CCSS.HSS.ID.B.5

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What is a line of best fit?

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

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CCSS.8.EE.B.5

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How can you identify a strong positive correlation on a scatter plot?

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A strong positive correlation is identified when the data points are closely clustered around an upward-sloping line.

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CCSS.HSS.ID.B.5

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How can you identify a strong negative correlation on a scatter plot?

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A strong negative correlation is identified when the data points are closely clustered around a downward-sloping line.

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CCSS.HSS.ID.B.5

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What does a weak correlation look like on a scatter plot?

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A weak correlation appears when the data points are spread out and do not closely follow a clear trend.

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CCSS.HSS.ID.B.5