Trina is making a graph that shows a proportional relationship between the amount of money collected, y, and the number of tickets sold, x. She correctly plots the point (600, 1,950). Which of these statements are true? Select all that are correct. (The point (140, 455) is on the graph because $455 will be collected if 140 tickets are sold.)
(The constant of proportionality is 600/1,950, which is about 31)
(The point (5,16.25) is not on the graph because it is impossible to sell 16.25 tickets.)
(The point (1,3.25) is on the graph and identifies that the cost for each ticket is $3.25.)
(The point (0,0) is on the graph because 0,0 is on the graph of all proportional relationships.)