Rory records the percentage of battery life remaining on his phone throughout a day. the graph represents the percentage of battery life remaining after a certain number of hours.
a graph titled phone battery life. the horizontal axis shows elapsed time (hours) numbered 2 to 20, and the horizontal axis shows battery life (%) numbered 10 to 120. a line begins at 100% in 0 hours, to 20% in 8 hours, to 100% from 10 to 12 hours, to 60% in 16 hours, to 100% from 17 to 20 hours.
at which times could rory's phone have been plugged into the charger? select three options.
6 hours
9 hours
11 hours
14 hours
19 hours