Ed
Explanation:
According to the performance ratings shown in the graphic chart, ‘Ed’ is the instructor whose performance has been the most changeable or fluctuating over the last five years. His performance has shifted regularly from (1 to 4 between 2005-06, then from 4 to 2 between 2006-07, and again 2 to 4 in 2007-08 and 4 to 1 in 2008-09). On the contrary, the other instructors have been able to maintain consistency at least once.
Throughout 2005-07, Jill stayed constant. Ralph’s performance remained consistent between 2006-07 and 2008-09. Tina was steady from 2007 until 2009. And Sam was able to maintain his performance throughout the 2008-09 school year.
This finding reinforces the claim that Ed has remained the most erratic and variable during the last five years.
Answer-
Ed had the most erratic year-to-year performance throughout this five-year period.
Solution-
Most variable performance refers to varied or inconsistent performance.
As seen in the graph,
Jill’s performance remained consistent from 2005 to 2007.
Ralph’s performance remained consistent during 2006-07 and 2008-09.
Tina’s performance remained consistent from 2007 to 2009.
Throughout 2008-09, Sam’s performance remained consistent.
Every one of them has been consistent at least once. However, in the instance of Ed, his performance was inconsistent or varied over time.
Ralph
Explanation in detail:
Ralph’s information progresses from 5 to 2 to 2 to 1 to 1. This data has a wider spread than any other instructor on the list.
Jill was the instructor with the most erratic year-to-year performance throughout this five-year period. Despite the fact that she began at a consistent pace from 2005 to 2007, her performance steadily improved in 2007 and beyond.
I don’t have the graph you’re referring to in your inquiry, but I can point you in the proper direction. If the teacher’s performance varies the greatest from year to year throughout a five-year period, the graph must indicate unstable changing data. Those with the least variation would have a consistent line moving up or down, or even simply straight.
Please offer a graph that depicts the teacher’s performance over a five-year period.