The Energy Information Administration (http://www.eia.doe.gov) tabulates information on the average cost of electricity (in cents per kwh) for residential customers in the United States. The data are...

The Energy Information Administration (http://www.eia.doe.gov) tabulates information on the average cost of electricity (in cents per kwh) for residential customers in the United States. The data are shown in Table 1.23 for the years 2000 through 2017.

(a) Plot the cost versus the year.

(b) Comment on the trends, or general patterns, that are present in the data.