Scatter Plots, Association, & Lines of Best Fit
Understand scatter plot data, association types, and lines of best fit.
How would you describe the association between the x and y values on the scatter plot? positive negative no association What is the association between the x and y values? positive negative no association What type of association does this graph have? positive negative no association What type of association does this graph have? positive negative no association Which sentence describes the association shown on this scatter plot? As the temperature decreases, the visitors increase. As the temperature increases, the number of visitors increases. As the visitors increase, the temperature decreases. No association This measures how strong or weak the relationship between two quantitative variables are. Line of best fit Scatter Plot Causation Correlation (also known as association) Do you think there is a positive correlation between study time and test grades? There is a positive correlation between study time and test grades. What type of correlation does this graph have? Positive Correlation Negative Correlation No Correlation All of the above Given the scatter plot below, what do you estimate the ice cream sales will be when it is 21°C? $600 $450 $100 $300 About how many male math teacher were there in 2006? 15 30 35 45 What is a line of best fit used for? To make predictions To make the graph look pretty To connect the points To make it look like you know what you are doing Is this line an accurate line of best fit for the data? Yes No Is this line an accurate line of best fit for the data? Yes No The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the line of best fit to predict how many chapters would be in a book with 180 pages. 12 chapters 15 chapters 18 chapters 21 chapters The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the line of best fit to predict how many pages would be in a book with 19 chapters. 170 pages 150 pages 210 pages 190 pages If a scatter plot has no association then....... ...it has not ordered pairs ...it has ordered pairs that have a negative pattern ...its ordered pairs have no predictable pattern ...if it makes a lion on a graph (ROAR!!)