Would the answer be -1? Need help with showing work

Question

What is the average rate of change from x=-1 to x=1

Answer 1

More information is needed.  If we are given a function y = f(x), then the average rate of change in going from x₁ to x₂ is

 

[f(x₂) - f(x₁)] / (x₂ - x₁).

 

x₁ = -1, x₂ = 1, but with no function f(x) specified, we cannot answer the question.