Question

What is the average rate of change for the quadratic function from x=-4 to x=8?

Answer 1

Just do

(f(8)-f(-4))/(8-(-4))

f(8)=-2
f(-4)=-74

average rate of change is (2-(-74))/(8-(-4))=(2+74)/(8+4)=76/12=19/3

the average rate of change is 19/3