The graph shows the number of paintballs, y, a machine launches in x seconds. Which expression can be used to calculate the rate per second at which the machine launches the balls? (1 point)
120 over 5
5 over 120
5 over 30
30 over 5​

The graph shows the number of paintballs y a machine launches in x seconds Which expression can be used to calculate the rate per second at which the machine la class=