Find the Definite Integral by Computing an Area $$\int _ { 1 } ^ { 8 } ( 5 x - 4 ) d x$$

Multiple Choice

Find the definite integral by computing an area.
- $$\int _ { 1 } ^ { 8 } ( 5 x - 4 ) d x$$

A) $\frac { 259 } { 2 }$
B) 128
C) $\frac { 371 } { 2 }$
D) $\frac { 315 } { 2 }$