Min created a miniature rocket launcher, and she's testing what happens as she launches heavier rockets. The graph below shows the height of one of her heavier rockets relative to the ground over time, where the rocket's height (y) is measured in meters and time (x) is measured in seconds. What was the greatest height that the rocket reached?
-10
6
4
2
0
(1 point)
○ 0 meters
3 meters
6 meters
9 meters
10 meters