8.5(d) Scatter Plot Trend Line Predictions

Front

What is a scatter plot?

Back

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

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What does a trend line represent in a scatter plot?

Back

A trend line is a straight line that best represents the data points in a scatter plot, indicating the general direction of the data.

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How do you determine the slope of a trend line?

Back

The slope of a trend line is determined by the change in the y-values divided by the change in the x-values between two points on the line.

Front

What does a positive association in a scatter plot indicate?

Back

A positive association indicates 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 indicate?

Back

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

Front

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

Back

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

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How can you use a trend line to make predictions?

Back

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

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What is interpolation in the context of scatter plots?

Back

Interpolation is the process of estimating a value within the range of known data points on a trend line.

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What is extrapolation in the context of scatter plots?

Back

Extrapolation is the process of estimating a value outside the range of known data points on a trend line.

Front

What is the importance of outliers in a scatter plot?

Back

Outliers are data points that differ significantly from other observations and can affect the slope and position of the trend line.