What is the answer??

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

What is equal to n in this equation

Which statements are true for the functions g(x)= x^2 and h(x) = -x^2? check all that apply