Can someone help with a math problem?
Derek threw a tennis ball up in the air. The following table represents the height f(t), in meters, of the ball above the ground at time t seconds:
Time (t)
(in seconds) Height f(t)
(in meters)
1 15
2 20
3 15
4 0
Which of the following is represented by the x-intercept of f(t)? (4 points)
The ball touches the ground after 4 seconds.
The ball was thrown from a height of 0 meters.
The ball reaches a maximum height of 20 meters.
The ball reaches the maximum height in 2 seconds.

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I think the answer is A.

A is the answer because the x-intercept is found when y is 0.
t = 4 when f(t) = y = 0

thank you @gina123

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