Scatter Plots - 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 line of best fit represent in a scatter plot?

Back

A line of best fit represents the trend in the data, helping to summarize the relationship between the variables and make predictions.

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How do you determine the slope of a line of best fit?

Back

The slope of a line of best fit is determined by the change in the y-values divided by the change in the x-values (rise over run).

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What is positive correlation in a scatter plot?

Back

Positive correlation occurs when an increase in one variable leads to an increase in another variable, resulting in an upward trend in the scatter plot.

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What is negative correlation in a scatter plot?

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Negative correlation occurs when an increase in one variable leads to a decrease in another variable, resulting in a downward trend in the scatter plot.

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What does no correlation mean in a scatter plot?

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No correlation means there is no discernible relationship between the two variables, and the data points do not show any clear trend.

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How can you use a line of best fit to make predictions?

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You can use a line of best fit to predict the value of one variable based on the value of another by finding the corresponding point on the line.

Front

What is the formula for a linear equation in slope-intercept form?

Back

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

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What does the y-intercept represent in a line of best fit?

Back

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

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How do you identify the line of best fit visually?

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The line of best fit can be identified visually by drawing a straight line that best represents the trend of the data points in the scatter plot.