Identifying Correlation and 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, showing the trend of the data points.

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How do you determine the line of best fit on a scatter plot?

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The line of best fit can be determined visually or mathematically using linear regression, minimizing the distance between the line and all data points.

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What does a positive correlation indicate?

Back

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

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What does a negative correlation indicate?

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

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What does no correlation mean?

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No correlation means there is no predictable relationship between the two variables; changes in one do not affect the other.

Front

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

Back

Front

What is the slope of a line?

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The slope of a line measures the steepness and direction of the line, calculated as the change in y over the change in x (rise over run).

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How can you identify a negative correlation on a graph?

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A negative correlation can be identified on a graph where the data points slope downwards from left to right.

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What is linear regression?

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Linear regression is a statistical method used to find the line of best fit by minimizing the sum of the squares of the vertical distances of the points from the line.

Front

What is the y-intercept in a linear equation?

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