The following data represent the number of AIDS cases in the United States among people aged 13–29 for the years 1981 to 1990. Plot these data to show the trend over time. (The data are in thousands...

The following data represent the number of AIDS cases in the United States among people aged 13–29 for the years 1981 to 1990. Plot these data to show the trend over time. (The data are in thousands of cases and come from two different data sources.)

(Before becoming complacent that the incidence of AIDS/HIV is now falling in the U.S., you need to know that in 2006 the United Nations estimated that 39.5 million people were living with AIDS/HIV. Just a little editorial comment.)