For the function f(x)= 4/x-3 , determine the value(s) of x where the tangent (s) that the curve are parallel to the secant having Slope of -1/16 ( the is a Rate of change question)

For the function f(x)= 4/x-3 , determine the value(s) of x where the tangent (s) that the curve are parallel to the secant having Slope of -1/16 ( the is a Rate of change question)