After the Surgeon General’s first warning in 1964, cigarette consumption began a steady de...

After the Surgeon General’s first warning in 1964, cigarette consumption began a steady decline as advertising was banned from television and radio, and public awareness of the dangers of cigarette smoking grew. The percentage of the U.S. adult population who considered themselves smokers is shown in the table for selected years. (a) Draw a scatterplot of the data, then (b) decide if the association is positive, negative, or cannot be determined.

Source: 1998Wall Street Journal Almanac and 2009 Statistical Abstract of the United States, Table 1299