WeBWorK Standalone Renderer

The table below gives values of $f(x,y)$ , the number of milligrams of mosquito larvae per square meter in a swamp.

	$x = 0$	$x = 3$	$x = 6$
$y = 0$	$1$	$2$	$4$
$y = 4$	$2$	$5$	$9$
$y = 8$	$5$	$9$	$14$

If $x$ and $y$ are in meters and $R$ is the rectangle $0 \leq x \leq 6$ , $0 \leq y \leq 8$ , estimate $\int _R {f(x,y)dA}$ .

$\int _R {f(x,y)dA} \approx$
(Include units in your answer.)