Scatterplots-Correlation & Best Fit Lines

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What is a scatterplot?

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

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What does a line of best fit represent in a scatterplot?

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A line of best fit is a straight line that best represents the data points in a scatterplot, indicating the overall trend of the data.

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What are the three types of correlation?

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

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What does positive correlation mean?

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

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What does negative correlation mean?

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

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What does no correlation mean?

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

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How can you identify a line of best fit on a scatterplot?

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A line of best fit can be identified by visually assessing the data points and drawing a line that minimizes the distance from all points.

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What is the purpose of predicting values using a scatterplot?

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The purpose of predicting values using a scatterplot is to estimate the value of one variable based on the known value of another variable.

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What is an example of a situation with negative correlation?

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An example of negative correlation is the relationship between the number of absences from school and a student's grade; as absences increase, grades tend to decrease.

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What is an example of a situation with positive correlation?

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An example of positive correlation is the relationship between study time and test scores; as study time increases, test scores tend to increase.