Scatter Plots and Line of Best Fit

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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 a linear relationship in a scatter plot indicate?

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A linear relationship indicates that as one variable increases or decreases, the other variable does so in a consistent manner, forming a straight line when graphed.

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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 slope of a line of best fit?

Back

The slope is determined by the change in y divided by the change in x (rise over run) between two points on the line.

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What is the y-intercept of a line?

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

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What does a positive association in a scatter plot mean?

Back

A positive association means that as one variable increases, the other variable also tends to increase.

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What does a negative association in a scatter plot mean?

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A negative association means that as one variable increases, the other variable tends to decrease.

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

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

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How can you visually assess the accuracy of a line of best fit?

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You can assess accuracy by checking how closely the data points cluster around the line; a good fit will have points close to the line.

Front

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

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