Scatter Plots and Line of Best Fit Flashcard

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Scatter plot

Back

A scatter plot is a type of plot or graph that displays values for two variables as points on a Cartesian plane.

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What does the line of best fit represent in a scatter plot?

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The trend or relationship between the variables

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What does a positive correlation in a scatter plot indicate?

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The two variables are directly related to each other and increase or decrease together.

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What does a negative correlation in a scatter plot indicate?

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As one variable increases, the other variable decreases.

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What does a correlation coefficient of 0 indicate?

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No linear relationship

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What does a correlation coefficient of 1 indicate?

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Perfect positive linear relationship

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What does a correlation coefficient of -1 indicate?

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Perfect negative linear relationship

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Equation of a line of best fit?

Back

y = mx + b

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

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The rate of change between the two variables being analyzed.

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How is the strength of correlation determined in a scatter plot?

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By the degree of closeness of the plotted points to a straight line