6. Gasoline Prices In 1988, the average price of regular unleaded gasoline
in Delaware was 58.6 cents per gallon. In 1989, the average price per
gallon rose to 67.1 cents, and in 1990, the average price was 74.4 cents
per gallon. Some 4800 miles away in Hawaii, the average price of regular
unleaded gasoline was 84.6 cents per gallon in 1988, 83.4 cents per gallon
in 1989, and 90.3 cents per gallon in 1990. Construct a double bar graph
that shows the price per gallon of regular unleaded gasoline for Delaware
and Hawaii for the years 1988–1990.