The graph below illustrates approximating rectangles with left endpoints for $f(x)=(\frac{16}{x})on$ the interval $2,6.$

The estimated area based $on$ these rectangles $is$

$(1),$ and this sum $is$

the area $of$ the region enclosed $byy=f(x),$ the $x-$axis, and the vertical lines $x=2$ and $x=$

The graph below illustrates approximating rectangles with right endpoints for $f(x)=(\frac{16}{x})on$ the interval $2,6.$

The estimated area based $on$ these rectangles $is$

and this sum $is$

$an$ underestimate $of$

the area $of$ the region enclosed $byy=f(x),$ the $x-$axis, and the vertical lines $x=2$ and $x=$