Find the difference quotient (f(x + h) - f(x) ) /h, where h ≠ 0, for the function f(x) = 7/(x - 3) . Simplify your answer as much as possible.
a) -7/(h * (x - 3) )
b) 7/(h * (x - 3) )
c) 7/h
d) -7h/(x - 3)