Evaluate the Sum Using the Given Information $$x _ { 1 } = - 5 , x _ { 2 } = - 4 , x _ { 3 } = - 1 , x _ { 4 } = 1 , \text { and } \Delta x = - 0.5 ; f ( x ) = \frac { 5 } { 2 x + 5 }$$

Evaluate the sum using the given information.
- $$x _ { 1 } = - 5 , x _ { 2 } = - 4 , x _ { 3 } = - 1 , x _ { 4 } = 1 , \text { and } \Delta x = - 0.5 ; f ( x ) = \frac { 5 } { 2 x + 5 }$$
$\sum _ { \mathrm { i } = 1 } ^ { 4 } \mathrm { f } \left( \mathrm { x } _ { \mathrm { i } } \right) \Delta \mathrm { x }$ (Round to the nearest tenth, if necessary.)

A) $- 1.5$
B) $0.1$
C) $- 5$
D) $1.8$