Answer:
A
Explanation:
Alright so in the graph we can see the highest y that is reach is at x=3 which is y=6. The maximum of the graph g(x) is 6.
Now we have to be a bit more algebraic and messy when comes to finding a maximum (the vertex of the parabola) of f(x)=-2x^2+4x+3.
First step, I'm going to find the x-coordinate of the vertex. Once we do that we can find the y that corresponds to it by using y=-2x^2+4x+3.
So the x-coordinate of the vertex can be found by computing -b/(2a).
a=-2 and b=4 so we are going to plug that in giving us -4/(2*-2)=-4/-4=1.
So the x-coordinate of the vertex is 1 and we are going to find the y that corresponds to that using y=-2x^2+4x+3.
So let's plug in 1.
This gives us:
y=-2(1)^2+4(1)+3
y=-2(1)+4+3
y=-2+4+3
y=2+3
y=5
So the maximum of graph f is 5.
6 is higher than 5
So g has the higher maximum
So the answer is A.