In f(x) = k(x)2, if k = 1 for the original graph, what happens to the graph of f(x) as k decreases toward O? O The graph of f(x) is shrunk horizontally by a factor of k O The graph of f(x) is stretched horizontally by a factor of k. The graph of f(x) is shrunk vertically by a factor of k. The graph of f(x) is stretched vertically by a factor of k.