__7. Cooling Tea: A freshly made cup of tea is served at a temperature of about 180°F. The tea cools rapidly at first, and then slows down gradually as it approaches room temperature.

Independent Quantity:

Dependent Quantity:

Time is always independent. Time depends on nothing, no matter what other quantity is changing time will continue to move, and it will always move in the same way (seconds, minutes, hours, and so on never change their duration).

The dependent quantity would be temperature. How hot the tea is depends on how much time has passed.