The graph shows how many bottles a machine caps in a certain number of seconds. Alternative Text Part A What is the constant of proportionality, and what does it mean in this situation? Use the drop-down menus to show and explain your answer. The constant of proportionality is ; the machine caps bottles in . Part B Which of the following is an ordered pair on the graph? What does it represent in this situation? A. (45, 90); the machine caps 45 bottles in 90 seconds. B. (45, 900); the machine caps 45 bottles in 900 seconds. C. (45, 900); the machine caps 900 bottles in 45 seconds. D. (900, 45); the machine caps 900 bottles in 45 seconds.