Express the Sum Using Summation Notation $2 + 8 + 18 + \ldots + 72$

Multiple Choice

Express the sum using summation notation.
- $2 + 8 + 18 + \ldots + 72$

A) $\sum _ { k = 0 } ^ { 6 } 2 k ^ { 2 }$
B) $\sum _ { k = 1 } ^ { 6 } k ^ { 2 }$
C) $\sum _ { k = 1 } ^ { 6 } 2 ^ { 2 } k$
D) $\sum _ { k = 1 } ^ { 6 } 2 k ^ { 2 }$