Scatter Plots and Lines of Fit

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Which of the following lines represents the line of best fit for the scatter plot?

• There is no line of best fit for this graph.

• B

• C

• D

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• There is no line of best fit for this graph because there is no trend.

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A

• B

• C

• D

Which line is the best fit for the data? (Half points above the line, half points below the line.)

• 
• 
• 
• 

Identify any outliers.

• Outlier at x = 18

• Outlier at x = 12

• Outlier at x = 6

• There aren't any outliers in this graph.

Identify any clusters.

• Cluster at x = 14

• Cluster at x = 18

• Cluster at x = 24

• There aren't any noteworthy clusters in this graph.

If there is a correlation, describe it.

• as time

  increases, the number of funds decreases

• the number of years increases, the number of funds increases

• as time

  decreases, the number of funds increase

Write the slope-intercept form of an equation for the line of fit.

The line of fit shown passes through

(1993, 16) and (1999, 5.7).

• y = -1.7x + 3404

• y = -1.55x - 3093.5

• y = 1.55x + 3093.5

• y = -1.55x + 3093.5

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