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 variables by displaying data points on a two-dimensional axis.

Front

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 slope indicate in a scatter plot?

Back

A positive slope indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative slope indicate in a scatter plot?

Back

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

Front

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 scatter plot.

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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 scatter plot.

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to make predictions by extending the line and estimating the value of the dependent variable for a given independent variable.

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 accuracy of the trend line.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a statistical measure that describes the strength and direction of a relationship between two variables.