The residents of a housing development for senior citizens have completed a survey in which they indicated how physically active they are and how many visitors they receive each week. Are these two variables related for the 10 cases reported here? Draw a scattergram and compute r and r2. Find the least-squares regression line. What would be the predicted number of visitors for a person whose level of activity was a 5?

How about a person who scored 18 on level of activity?