A professor went to a website for rating professors and looked up the quality rating and also the "easiness" of the six full-time professors in one department. The ratings are 1 (lowest quality) to 5 (highest quality) and 1 (hardest) to 5 (easiest). The numbers given are averages for each professor. Assume the trend is linear, find the correlation, and comment on what it means.
Quality
4.8
4.5
4.2
4.1
3.9
3.5
Easiness
3.7
3.1
3.3
2.5
1.7
2.1