The data in NewHomeSales represent number and median sales price of new single-family houses sold in the

Question:

The data in NewHomeSales represent number and median sales price of new single-family houses sold in the United States recorded at the end of each month from January 2000 through December 2014. (Data extracted from www.census.gov, February 28, 2015.)
a. Construct a time-series plot of new home sales prices.
b. What pattern, if any, is present in the data?