Suppose f(x) = x2 and g(x) = 4x2. which statement best compares the graph of g(x) with the graph of f(x)? a. the graph of g(x) is the graph of f(x) vertically compressed by a factor of 4. b. the graph of g(x) is the graph of f(x) horizontally stretched by a factor of 4. c. the graph of g(x) is the graph of f(x) vertically stretched by a factor of 4. d. the graph of g(x) is the graph of f(x) shifted 4 units left.