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