The table shows the national expenditures for health care in the United States for selected years, with projections to 2020. National Expenditures Care (billions) for Health $28 75 254 714 T 1017 1353 1981 2954 3308 4487 (a) Use a scatter plot with x as the number of years past 1950 and y as the total expenditures for health care (in billions) to identify what type (or types) of function(s) would make a good model for these data. KEIZ 60 1000 2000 3000 4000 5000 y 200 150 100 50 y 5000 4000 3000 O 2000 1000 Year 1960 1970 1980 1990 1995 2000 2005 2010 2015 2020 20 500 40 1000 60 80 1500 100 2000 Q y 100 80 40 20 5000 4000 3000 2000 1000 20 40 60 80 100 Q

97000 96000 95000 94000 93000 92000 91000 90000 89000 1000 Revenue vs TV Advertise 2000 3000 4000 5000 6000 97000 96000 95000 94000 93000 92000 91000 90000 89000 Revenue vs Print Advertise 1000 1500 2000 2500 3000 3500 4000 4500 Given above are the plots between weekly gross revenues and TV advertising and between weekly gross revenues and TV advertising for Showtime Movie Theaters. Which advertising (TV or Print) has a stronger relationship with the weekly gross revenues? O A. Print Advertising has stronger relationship with the weekly gross revenue. B. We cannot tell without calculating the related correlation coefficients. O C. TV Advertising has stronger relationship with the weekly gross revenue. O D. The strength of the relationships is the same for both advertising.

Which ideas about functions do you think might be the most helpful to you in your day-to-day planning?