Final answer:
The correct equation that represents the inverse function B(a) for the given function A(b) is b(a) = a/5 - 4 (option B).
Step-by-step explanation:
The inverse function of a given function can be found by switching the roles of the dependent and independent variables and solving for the new dependent variable. In this case, we are given function A(b) and we want to find the inverse function B(a).
The correct equation that represents the inverse function B(a) is b(a) = a/5 - 4 (option B).