Scatterplots intro

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What is a scatterplot?

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A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

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CCSS.8.SP.A.1

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What does a positive correlation indicate in a scatterplot?

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A positive correlation indicates that 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 indicate in a scatterplot?

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A negative correlation indicates 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 in a scatterplot?

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No correlation means there is no discernible relationship between the two variables; changes in one do not affect the other.

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CCSS.HSS.ID.B.5

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How can outliers affect the interpretation of a scatterplot?

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Outliers can skew the perception of the relationship between variables, potentially leading to incorrect conclusions.

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CCSS.8.SP.A.1

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What is the purpose of using scatterplots in data analysis?

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Scatterplots are used to visually assess the relationship between two quantitative variables, helping to identify trends, correlations, and outliers.

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CCSS.8.SP.A.1

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What is the difference between linear and non-linear associations in scatterplots?

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A linear association shows a straight-line relationship between variables, while a non-linear association shows a curved relationship.

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CCSS.HSS.ID.B.5

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How do you identify an outlier in a scatterplot?

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An outlier is identified as a point that lies significantly outside the overall pattern of the data, often distant from other points.

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CCSS.8.SP.A.1

Front

What is the significance of the slope in a scatterplot?

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The slope indicates the direction and strength of the relationship between the two variables; a steeper slope indicates a stronger relationship.

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CCSS.8.EE.B.5

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What does the term 'regression line' refer to in the context of scatterplots?

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A regression line is a straight line that best fits the data points in a scatterplot, used to predict values of one variable based on another.

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CCSS.8.SP.A.2