The ABC Corporation has been tracking its average weekly customer satisfaction rating on scale of 1 to 5. The data for the past 20 weeks are listed below. Please make a trend chart and comment on the company's customer satisfaction performance.

Week Average customer Satisfaction Rating

1 3.5

2 3.8

3 4.2

4 4

5 2.8

6 3.3

7 3.7

8 2.9

9 2.5

10 3.4

11 3.6

12 3.7

13 4.2

14 4.5

15 3.9

16 4.7

17 4.8

18 4.6

19 4

20 4.1