Since g(x) is a transformation of f(x) and the "-3" is outside the f(x) notation, the transformation will effect the y-values of the points on the graph of f(x).
What will subtracting 3 from every y-value of every point on the graph of f(x) do to the graph?
And more specifically, what will that do to the vertex that was at the point (3,5)?
* r^2