Line of Best Fit Review

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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. It shows the trend of the data points.

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How do you calculate the line of best fit?

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You can calculate the line of best fit using methods like least squares regression, which minimizes the distance between the data points and the line.

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

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The slope represents the rate of change of the dependent variable (y) with respect to the independent variable (x).

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What does the y-intercept of a line of best fit indicate?

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The y-intercept indicates the value of y when x is zero, representing the starting point of the relationship.

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What is an outlier in a scatterplot?

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An outlier is a point that is far outside the main cluster of points, which can affect the line of best fit.

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What does a positive association in a scatterplot mean?

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

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What does a negative association in a scatterplot mean?

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

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What is no association in a scatterplot?

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No association means there is no clear relationship between the two variables; changes in one do not predict changes in the other.

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

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How can you identify the line of best fit on a graph?

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You can identify the line of best fit by visually drawing a line that minimizes the distance to all points or by using statistical software.