Line of Best Fit

Front

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 slope of a Line of Best Fit?

Back

The slope is determined by selecting two points on the line and using the formula: (y2 - y1) / (x2 - x1).

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What does a positive correlation indicate?

Back

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

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What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

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What does no correlation mean?

Back

No correlation means there is no predictable relationship between the two variables.

Front

How can you use a Line of Best Fit to make predictions?

Back

You can use the equation of the Line of Best Fit to estimate the value of one variable based on the value of another.

Front

What is the purpose of a scatter plot?

Back

A scatter plot is used to display the relationship between two quantitative variables.

Front

What is the formula for the equation of a Line of Best Fit?

Back

The equation is typically in the form y = mx + b, where m is the slope and b is the y-intercept.

Front

How do outliers affect the Line of Best Fit?

Back

Outliers can skew the Line of Best Fit, making it less representative of the overall data trend.

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What is the significance of the y-intercept in a Line of Best Fit?

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The y-intercept is the value of y when x is zero, indicating where the line crosses the y-axis.