$\sum _ { i = 1 } ^ { n } \left( a x _ {i } + b \right)$

Multiple Choice

$\sum _ { i = 1 } ^ { n } \left( a x _ {i } + b \right)$

A) n × a × $\overline { \mathrm { x } }$ + n × b
B) n(a + b)
C) $\bar { x } + n \times b$
D) $n \times a \times \bar { x }$