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.

Tags

CCSS.8.EE.B.5

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.

Tags

CCSS.8.EE.B.5

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.

Tags

CCSS.8.EE.B.5

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.

Tags

CCSS.8.EE.B.5

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.

Tags

CCSS.8.EE.C.7B

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.

Tags

CCSS.8.EE.B.5