line of best fit

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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. It shows the general direction of the data points.

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How do you determine the line of best fit?

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The line of best fit is determined using statistical methods, such as least squares regression, which minimizes the distance between the data points and the line.

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What does a positive slope in a line of best fit indicate?

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A positive slope indicates that as the x-values increase, the y-values also increase, showing a positive correlation between the two variables.

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What does a negative slope in a line of best fit indicate?

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A negative slope indicates that as the x-values increase, the y-values decrease, showing a negative correlation between the two variables.

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What is the equation of a line in slope-intercept form?

Back

Front

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

Back

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What is an outlier in a data set?

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An outlier is a data point that differs significantly from other observations in the data set, often appearing far away from the trend of the data.

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How can you identify an outlier in a scatter plot?

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An outlier can be identified in a scatter plot as a point that is distant from the cluster of other points, not following the general trend.

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What is the purpose of the line of best fit?

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The purpose of the line of best fit is to summarize the relationship between two variables and to make predictions based on that relationship.

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What does it mean if the line of best fit is horizontal?

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A horizontal line of best fit indicates that there is no correlation between the x and y variables; changes in x do not affect y.