Federal flood insurance underwritten by the federal government was initiated in 1968. This federal flood insurance coverage has, according to USA Today

(“How you pay for people to build in flood zones,”

Sep. 21, 2005), more than tripled between 1990 and 2004. A file titled Flood contains the amount of federal flood insurance coverage for each of the years from 1990 to 2004.

a. Produce a line plot for these data.

b. Describe the type of relationship between the year and the amount of federal flood insurance.

c. Determine the average increase per year in federal flood insurance.

2-60. The G.H. Hillman Company sells designer clothes under various brand names. The data file called Hillman contains the unit sales (in thousands) for their swimsuit line in both the east and west regions for the years 2005 through 2015.

a. Plot the sales data for the two regions on the same line graph.

b. Discuss the relationship over time between sales in the west and east regions.