Find the Average Value of the Given Function Over the Indicated

Multiple Choice

Find the average value of the given function over the indicated domain. $f ( x , y ) = y$

A) $- 2$
B) $\frac { 4 } { 3 }$
C) $- \frac { 2 } { 3 }$
D) 2
E) $\frac { 2 } { 3 }$