Scatter Plots and Interpreting Trend Lines

What type of association does this graph have?

• positive 
• negative
• none
• all of the above

What type of association does this graph have?

• positive
• negative
• none
• all of the above

Based on the graph, if Joe earned $400, how many hours did he work?

• 20 hours
• 35 hours
• 45 hours
• 15 hours

What type of correlation does this graph have?

• positive linear
• negative linear
• positive nonlinear
• negative nonlinear

Which scatter plot shows a LINEAR relationship between x and y?

• Graph A
• Graph B
• Graph C
• Graph D

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. (Where does the line match up with the x value of chapters?)

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

What is a line of best fit used for?

• To make predictions
• To make the graph look pretty
• To connect the points

Which sentence describes the relationship shown on this scatterplot?

• As the temperature decreases, the visitors increase. 
• As the temperature increases, the number of visitors increases. 
• As the visitors increase, the temperature decreases. 
• No correlation

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month.  Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles? 

• A. 50 min
• B. 80 min
• C. 45 min
• D. 60 min

What does "m" represent in y=mx+b?

• y-intercept
• slope
• macaroni
• nothing