Scatter Plot Correlation/Predictions

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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 grid.

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CCSS.8.SP.A.1

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What does correlation mean in a scatter plot?

Back

Correlation refers to the degree to which two variables move in relation to each other. It can be positive, negative, or zero.

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CCSS.HSS.ID.B.5

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What is a trend line?

Back

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

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CCSS.HSF-LE.A.1B

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How can you use a trend line to make predictions?

Back

You can extend the trend line to estimate the value of one variable based on the value of another variable.

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

Back

A positive correlation is indicated by data points that slope upwards from left to right, meaning as one variable increases, the other also increases.

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CCSS.HSS.ID.B.5

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

Back

A negative correlation is indicated by data points that slope downwards from left to right, meaning as one variable increases, the other decreases.

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CCSS.HSS.ID.B.5

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What does no correlation mean?

Back

No correlation means there is no discernible relationship between the two variables, and the data points are scattered randomly.

Tags

CCSS.HSS.ID.B.5

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How can you determine the strength of a correlation?

Back

The strength of a correlation can be determined by how closely the data points cluster around the trend line; tighter clusters indicate stronger correlations.

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CCSS.HSS.ID.B.5

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What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data in 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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What is an example of a positive correlation in real life?

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An example of a positive correlation is the relationship between hours studied and test scores; generally, more study hours lead to higher scores.

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CCSS.HSS.ID.B.5