Use your graphing calculator to determine if the equation appears to be an identity by graphing the left expression and right expression together. If so, then prove the identity. 
Definitions:
Drinking Coffee
The consumption of coffee, a brewed drink prepared from roasted coffee beans, often associated with stimulating effects.
Sober Up
The process of becoming free from the effects of alcohol or drugs.
Marijuana Smoke
The inhalation and exhalation of smoke produced by burning marijuana, a psychoactive drug from the Cannabis plant.
Lung Cancer
A type of cancer that originates in the lungs, often associated with smoking, and characterized by uncontrolled cell growth in lung tissue.
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