Line of Best Fit

Front

What is the line of best fit?

Back

The 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.

Front

How do you find the line of best fit using a calculator?

Back

You can find the line of best fit by entering the data points into a graphing calculator and using the regression function to calculate the equation of the line.

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

Back

The slope of the line of best fit represents the rate of change between the two variables being compared.

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

Back

The y-intercept indicates the value of the dependent variable when the independent variable is zero.

Front

If the line of best fit has a positive slope, what does that mean?

Back

A positive slope indicates that as the independent variable increases, the dependent variable also increases.

Front

If the line of best fit has a negative slope, what does that mean?

Back

A negative slope indicates that as the independent variable increases, the dependent variable decreases.

Front

What is the purpose of using a line of best fit in data analysis?

Back

The purpose is to summarize the relationship between two variables and make predictions based on the data.

Front

What is a scatter plot?

Back

A scatter plot is a graph that displays two variables as points on a Cartesian plane, showing the relationship between them.

Front

What is the formula for a linear equation?

Back

The formula for a linear equation is typically written as y = mx + b, where m is the slope and b is the y-intercept.

Front

How can you determine if a line of best fit is a good representation of the data?

Back

You can determine this by looking at how closely the data points cluster around the line. A good fit will have points that are close to the line.