What is the a-value of the function, then determine if the graph opens up or down f(x) = 2(x+3)2+4? question 4 options: a= 2, opens up a= 2, opens down a= 4, opens up a= 4, opens down let f(x)=4x2−5 . a new quadratic function g(x) is the function f(x) stretched vertically by a factor of 2. what is the equation of this new function g(x)? question 7 options: g(x)=4x2−3 g(x)=8x2−10 g(x)=4(x+2)2−5 g(x)=8x2−5