Find the domain of the function. 
Definitions:
Y-variable
The dependent variable in an equation or a model, whose value is predicted or explained by other variables.
Units
Basic measures or quantities adopted to quantify and express the count of objects, substance volume, or other phenomena.
Cold Drinks
Beverages that are served chilled, often including sodas, iced teas, and various types of juices.
Temperature
A physical quantity expressing the subjective perceptions of hot and cold, measured by a thermometer.
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