Line of Best Fit Review

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What is a scatter plot?

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A scatter plot is a graph that shows the relationship between two variables by displaying data points on a two-dimensional grid.

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What does a linear relationship in a scatter plot indicate?

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A linear relationship indicates that as one variable increases or decreases, the other variable does so in a consistent manner, forming a straight line when graphed.

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What is the purpose of a line of best fit?

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The line of best fit is used to summarize the relationship between variables in a scatter plot and to make predictions based on that relationship.

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How do you determine the line of best fit?

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The line of best fit is determined by minimizing the distance between the line and all the data points, often using a method called least squares.

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

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

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

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A positive slope indicates that as the independent variable (x) increases, the dependent variable (y) also increases.

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

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A negative slope indicates that as the independent variable (x) increases, the dependent variable (y) decreases.

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What is the y-intercept in the context of a line of best fit?

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The y-intercept is the point where the line of best fit crosses the y-axis, representing the value of y when x is zero.

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How can you use the line of best fit to make predictions?

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You can use the equation of the line of best fit to predict the value of y for any given value of x by substituting x into the equation.

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

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