Scatter Plots and Predicting Values

___ data that clusters along a line.

• line of best fit

• linear association

• nonlinear association

• linear equation

____ bivariate data in which an increase in one data set results in a decrease in the other data set.

• positive association

• equal association

• no association

• negative association

___ a set of data that do not cluster around a line.

• positive association

• negative association

• nonlinear association

• linear equation

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters

• 15 chapters

• 18 chapters

• 21 chapters

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Predicting the number of days to finish when you read 40 pages is an example of:

• Interpolation

• Extrapolation

• An outlier

Predicting the band grade after 3.5 hours of practice is an example of:

• Interpolation

• Extrapolation

• An outlier

This means to predict a value inside the known values on a graph.

• trend line

• interpolation

• extrapolation

• causation

This means to predict a value outside the known values on a graph.

• trend line

• interpolation

• extrapolation

• causation

Select the statement that best describes the line.

• The line is the line of best fit.

• The line is NOT a line of best fit because it does not pass through two points.

• The line is NOT a line of best fit because it does not go through the middle of the data set.

• The line is NOT a line of best fit because it does not go through the origin.