The end behavior of the polynomial functions is determined by their leading terms, with

rising to the right, and f(x) = 4x(x - 4)(x + 2) falling to the left and rising to the right.
The end behavior of a polynomial function is determined by the leading term, which is the term with the highest exponent. Let's analyze each polynomial function:
The leading term is
. Since, the coefficient is positive and the exponent is even, the end behavior is 3. Rises to the left and rises to the right.
The leading term is
. Since the coefficient is negative and the exponent is odd, the end behavior is 2. Rises to the left and falls to the right.
f(x) = 4x(x - 4)(x + 2): The leading term when expanded is
. Since the coefficient is positive and the exponent is odd, the end behavior is 1. Falls to the left and rises to the right.