A linear function models the temperature of a cooling liquid, in degrees Celsius, minutes after it is removed from a heat source. At minutes, the temperature is . At minutes, the temperature is . What does the value of represent in this context?
The rate at which the liquid is cooling.
The temperature of the liquid after 15 minutes.
The initial temperature of the liquid when it was removed from the heat source.
The time it takes for the liquid to reach .
