What is the equation in vertex form of a parabola with vertex (2, 4) that opens downward and is stretched by a factor of 3? Group of answer choices LaTeX: f(x) = 3(x - 2)^2 + 4 f ( x ) = 3 ( x − 2 ) 2 + 4 LaTeX: f(x) = 3(x - 2)^2 - 4 f ( x ) = 3 ( x − 2 ) 2 − 4 LaTeX: f(x) = -3(x - 2)^2 + 4 f ( x ) = − 3 ( x − 2 ) 2 + 4 LaTeX: f(x) = -3(x + 2)^2 + 4