Help with macroeconomic

Using an Internet search engine of your choice, run a series of searches for historical data on the U.S. ;inflation ;rates for the past 40 years.

Complete a separate search on historical U.S. ;unemployment ;rates for the past 40 years.

After sampling the data, does there appear to be a relationship between the two? If so, what type of relationship? Does the relationship persist throughout the 40-year period or are there times when there are exceptions? Why might these exceptions exist?

400 words please list the reference ;