Express the Sum Using Summation Notation $$2 + 4 + 6 + \cdots + 14$$

Multiple Choice

Express the sum using summation notation.
- $$2 + 4 + 6 + \cdots + 14$$

A)
$\sum _ { k = 0 } ^ { 7 } 2 k$
B)
$\sum _ { k = 1 } ^ { 7 } 2 k$
C)
$\sum _ { k = 1 } ^ { 7 } k ^ { 2 }$
D)
$\sum _ { k = 1 } ^ { 7 } 2 k ^ { 2 }$