8.5D 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 trend line represent in a scatter plot?

Back

A trend line represents the general direction or pattern of the data points in a scatter plot, indicating the relationship between the variables.

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CCSS.8.SP.A.2

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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, minimizing the distance between the line and all data points.

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CCSS.8.EE.B.5

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How do you determine if a line is a line of best fit?

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A line is a line of best fit if it passes through the middle of the data points and accurately represents the trend of the data.

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What does it mean if a scatter plot shows a positive correlation?

Back

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

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CCSS.HSS.ID.B.5

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What does it mean if a scatter plot shows a negative correlation?

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

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CCSS.HSS.ID.B.5

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What is the purpose of using a trend line in predictions?

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A trend line is used in predictions to estimate the value of one variable based on the value of another variable.

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How can you use a trend line to make predictions?

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You can use a trend line by locating the value on the x-axis, moving up to the trend line, and then moving horizontally to find the corresponding value on the y-axis.

Tags

CCSS.8.EE.B.5

Front

What is the significance of outliers in a scatter plot?

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Outliers are data points that differ significantly from other observations and can affect the accuracy of the trend line.

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CCSS.HSF-LE.A.1B

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What is interpolation in the context of scatter plots?

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Interpolation is estimating a value within the range of the data points on a scatter plot.

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CCSS.HSS.ID.B.6A