National news on television features commercials describing pharmaceutical drugs that treat ailments that plague older people. Apparently, the major networks believe that older people tend to watch national newscasts. The marketing manager of a drug company conducted a survey that took a random sample of people older than 60 years of age and recorded their age and the number of days they watched national on television in a typical week.

a. Test to determine whether there is enough evidence to conclude that there is a linear relationship between age and number of days watching national news.

b. Calculate the coefficient of determination and briefly describe what it tells you.