SOL review Line and Curve of Best fit

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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, showing the trend of the data points.

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How do you determine the equation of a line of best fit?

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The equation of a line of best fit can be determined using statistical methods such as linear regression, which calculates the slope and y-intercept based on the data points.

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What does a positive relationship in a scatter plot indicate?

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A positive relationship indicates that as one variable increases, the other variable also tends to increase.

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What does a negative relationship in a scatter plot indicate?

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A negative relationship indicates that as one variable increases, the other variable tends to decrease.

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What does it mean if there is no relationship in a scatter plot?

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No relationship means that there is no discernible pattern or correlation between the two variables.

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What is a quadratic model?

Back

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How can you use a 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 output value for a given input by substituting the input value into the equation.

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What is the significance of the slope in the equation of a line?

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The slope indicates the rate of change of the dependent variable with respect to the independent variable; a steeper slope means a greater change.

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

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The y-intercept is the value of the dependent variable when the independent variable is zero, representing where the line crosses the y-axis.

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How do you interpret the coefficients in a quadratic equation?

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