Scatter Plots and Lines of Best Fit

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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 axis.

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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 increases.

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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 decreases.

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CCSS.HSS.ID.B.5

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What is a line of best fit?

Back

A 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

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

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A linear relationship can be identified if the data points roughly form a straight line.

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CCSS.8.F.A.3

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What is a cluster in a scatter plot?

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A cluster is a group of data points that are located close together in a certain area of the graph.

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CCSS.8.SP.A.1

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What is a gap in a scatter plot?

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A gap is an area in a scatter plot where there are no data points.

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CCSS.8.EE.B.5

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What does the slope of a line of best fit represent?

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The slope of a line of best fit represents the rate of change between the two variables.

Tags

CCSS.8.EE.B.5

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What is the y-intercept in the equation of a line?

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The y-intercept is the value of y when x is zero, indicating where the line crosses the y-axis.

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How do you determine the equation of a line of best fit?

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The equation of a line of best fit can be determined using statistical methods such as linear regression.

Tags

CCSS.8.EE.B.5