Scatter Plots and Line of Best Fit Review 2025

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What is a scatter plot?

Back

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

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What does the line of best fit represent in a scatter plot?

Back

The line of best fit represents the trend in the data, showing the general direction that the data points follow.

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What is an outlier in a scatter plot?

Back

An outlier is a data point that is significantly different from other points in the dataset, often lying far away from the main cluster.

Front

How can you determine the relationship between two variables in a scatter plot?

Back

By observing the direction of the line of best fit: if it slopes upwards, there is a positive relationship; if it slopes downwards, there is a negative relationship.

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What does a positive correlation in a scatter plot 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 in a scatter plot 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 is the purpose of the line of best fit?

Back

The purpose of the line of best fit is to summarize the relationship between the variables and make predictions based on the data.

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How do you identify an outlier in a scatter plot?

Back

An outlier can be identified as a point that lies far away from the other points in the scatter plot.

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

Back

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

Front

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.