Is this answer correct?
A toy rocket was launched from the ground. The function f(x) = -16x^2 + 128x shows the height of the rocket f(x), in feet, from the ground at time x seconds.
What is the axis of symmetry of the graph of f(x) and what does it represent?

x = 4; it takes 4 seconds to reach the maximum height and 4 seconds to fall back to the ground
OR this answers?
x = 4, it takes 4 seconds to reach the maximum height and 8 seconds to fall back to the ground

Question

Is this answer correct?
A toy rocket was launched from the ground. The function f(x) = -16x^2 + 128x shows the height of the rocket f(x), in feet, from the ground at time x seconds.
What is the axis of symmetry of the graph of f(x) and what does it represent?

	x = 4; it takes 4 seconds to reach the maximum height and 4 seconds to fall back to the ground
OR this answers?
x = 4, it takes 4 seconds to reach the maximum height and 8 seconds to fall back to the ground