The Best Answer is which teacher exhibited the most variable year-to-year performance over this 5-year span?
The Correct Answer is Ed exhibited the most variable year-to-year performance over this 5-year span.
Explanation:
All of them has been consistence for at-least once. But, in case of Ed, throughout the time, his performance was in-consistence or variable.
Sam's performance was constant throughout 2008-09.
Ralph's performance was constant throughout 2006-07 and also in 2008-09.
Jill's performance was constant throughout 2005-07.
Tina's performance was constant throughout 2007-09
Most variable performance means varying performance or non-consistence performance.
As shown in the graph,
Lorem ipsum dolor sit amet, consectetur adipiscing elit,
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor
in reprehenderit in voluptate velit esse cillum dolore eu fugiat.
SHOW ANSWER