Making Predictions From Trendlines

Front

What is a trendline?

Back

A trendline is a line that is drawn on a graph to show the general direction or trend of a set of data points.

Front

How can trendlines be used to make predictions?

Back

Trendlines can be extended to predict future values based on the established relationship in the data.

Front

What does a scatterplot represent?

Back

A scatterplot represents the relationship between two variables, showing how one variable may affect another.

Front

What is the purpose of a line of best fit?

Back

The line of best fit is used to summarize the relationship between variables in a scatterplot and to make predictions.

Front

How do you determine the value of a variable using a trendline?

Back

To determine the value, locate the corresponding value on the trendline for the given input variable.

Front

What does a positive slope in a trendline indicate?

Back

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

Front

What does a negative slope in a trendline indicate?

Back

A negative slope indicates that as one variable increases, the other variable decreases.

Front

What is interpolation in the context of trendlines?

Back

Interpolation is estimating a value within the range of known data points using the trendline.

Front

What is extrapolation in the context of trendlines?

Back

Extrapolation is estimating a value outside the range of known data points using the trendline.

Front

What factors can affect the accuracy of predictions made from trendlines?

Back

Factors include the quality of the data, the presence of outliers, and the appropriateness of the trendline model.