Making Predictions From Trendlines

Front

What is a trendline?

Back

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

Front

How do you use a trendline to make predictions?

Back

You can use a trendline to estimate values by finding where a specific x-value intersects the trendline and reading the corresponding y-value.

Front

What does the slope of a trendline represent?

Back

The slope of a trendline represents the rate of change between the two variables plotted on the scatterplot.

Front

What is the line of best fit?

Back

The line of best fit is a trendline that best represents the data points in a scatterplot, minimizing the distance between the line and all points.

Front

How can you determine if a trendline is a good fit for the data?

Back

A good trendline will closely follow the pattern of the data points, with minimal scatter around the line.

Front

What does it mean if a trendline has a positive slope?

Back

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

Front

What does it mean if a trendline has a negative slope?

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 the process of estimating a value within the range of the data points using the trendline.

Front

What is extrapolation in the context of trendlines?

Back

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

Front

How can you identify the line of best fit on a scatterplot?

Back

The line of best fit can be identified as the line that minimizes the distance from all data points to the line itself.