Evaluate the Sum Using the Given Information $\mathrm { x } _ { 1 } = - 5 , \mathrm { x } _ { 2 } = 4 , \mathrm { x } _ { 3 } = - 3 , \mathrm { x } _ { 4 } = - 1$

Multiple Choice

Evaluate the sum using the given information.
- $\mathrm { x } _ { 1 } = - 5 , \mathrm { x } _ { 2 } = 4 , \mathrm { x } _ { 3 } = - 3 , \mathrm { x } _ { 4 } = - 1$ , and $\Delta \mathrm { x } = - 0.8 ; \mathrm { f } ( \mathrm { x } ) = \frac { 1 } { 2 \mathrm { x } + 5 }$
$\sum _ { \mathrm { i } = 1 } ^ { 4 } \mathrm { f } \left( \mathrm { x } _ { \mathrm { i } } \right) \Delta \mathrm { x }$ (Round to the nearest tenth, if necessary.)

A) $0.6$
B) $0.8$
C) $- 1$
D) $- 0.3$