Find the Average Rate of Change of the Function from X₁

Multiple Choice

Find the average rate of change of the function from x₁ = 1 to x₂ = 5.? $$f ( x ) = x ^ { 2 } - 3 x + 6$$ ?

A) The average rate of change from x₁ = 1 to x₂ = 5 is 19.
B) The average rate of change from x₁ = 1 to x₂ = 5 is 3.
C) The average rate of change from x₁ = 1 to x₂ = 5 is -6.
D) The average rate of change from x₁ = 1 to x₂ = 5 is -3.
E) The average rate of change from x₁ = 1 to x₂ = 5 is 6.