A toy rocket was launched from the ground. The function f(x) = -16x² + 160x 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?

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Ax = 10; it takes 10 seconds to reach the maximum height and 10 seconds to fall back to the ground

Bx = 10; it takes 10 seconds to reach the maximum height and 20 seconds to fall back to the ground

Cx = 5; it takes 5 seconds to reach the maximum height and 10 seconds to fall back to the ground

Dx = 5; it takes 5 seconds to reach the maximum height and 5 seconds to fall back to the ground

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I was absent for a week and we only touched up on this one day when I got back.

I really appreciate any and all help given.

Ranking Brianliest to the one who can give step by step instruction included in their answer.