22 Height versus Time for a Trampolining Gymnast 20 Im 1 2 3 Time seconds 15 10 0 4 5 To break a height record in a trampolining competition a gymnast repeatedly bounced on a trampoline using increasing amounts of force to achieve greater heights The graph above represents the relationship between the time elapsed after the start of the jumps and the height of the gymnast above the trampoline How many times was the gymnast at a height of 15 feet A Three B Two C One