Find the Average Rate of Change For $f ( x ) = - 3 x ^ { 2 } - 2 x + 5$

Find the average rate of change for $f ( x ) = - 3 x ^ { 2 } - 2 x + 5$ on [-2, 1]

A) - 7
B) 1
C) -3
D) 0
E) 3