please help!!!!
The graph represents the height y, in meters, above a lake of a rock x seconds after it is thrown from a ledge.
Which statements are true?
Select EACH correct answer.
The rock reaches a maximum height of 38 m.
The rock reaches a maximum height of 43 m.
The height of the rock is decreasing for 2 s.
The rock travels at 4 m/s .
The rock is in the air for 4 s.
