plz, I hate school and I can't find an answer to this. Vicky charged her phone’s battery to 100 percent. Then she took the phone off the charger. When her phone is off the charger, it loses 5 percent of its battery life every hour. What function models the percentage of battery life left in terms of the number of hours since Vicky took it off the charger? What is the dependent quantity, and which variable should represent it?