Question

rory records the percentage of battery life remaining on his phone throughout a day. the battery life decreases as rory uses the phone, but will increase or stay at 100% while charging. the graph represents the percentage of battery life remaining after a certain number of hours.
at which times could rorys phone have been plugged into the charger? select three options.
□ 6 hours
□ 9 hours
□ 11 hours
□ 14 hours
□ 19 hours

Explanation:

When the phone is charging, battery life increases or stays at 100%. We look for upward-trending or flat (100%) segments on the graph:

1. 8-12 hours: Battery rises from ~20% to 100% (charging).
2. 14-16 hours: Battery rises from ~60% to 100% (charging).
3. 16-20 hours: Battery stays at 100% (charging or fully charged).

We select times within these intervals.

Answer:

9 hours, 14 hours, 19 hours