Help me!! The graph shown above demonstrates the height, y, in meters of a rocket launched over time, x, in seconds. Three students are analyzing the graph. This is what they each say:

Tracy: It took the rocket the same amount of time to reach the highest point in its flight as it did to land on the ground.

Kristen: It looks like the rocket landed 10.5 feet from where it was launched.

Bill: Based upon the y-intercept, it looks like the rocket must have been launched about 50 meters above sea level.

Write down the name of the student you think correctly described the graph in context. Explain why you agree with that student.