Which teacher exhibited the most variable year to year performance over this 5 year span?

The teacher that exhibited the most variable year to year performance over this 5 year span is Jill. Even though she started out at a constant rate from 2005 to 2007, her performances gradually increases in the year 2007 and beyond.

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

happy to

pls mark as brainliest