Find and Simplify the Function $$f ( x , y ) = \int _ { x } ^ { y } \frac { 9 } { t } d t \text { at the given value } ( 10,5 )$$

Multiple Choice

Find and simplify the function $$f ( x , y ) = \int _ { x } ^ { y } \frac { 9 } { t } d t \text { at the given value } ( 10,5 )$$

A) $- 9 \ln ( 10 )$
B) $- 18 \ln ( 2 )$
C) $\quad 9 \ln ( 2 )$
D) $- 9 \ln ( 2 )$
E) $18 \ln ( 10 )$