Use the sign diagram for 
to determine the largest interval on which f (x) decreases, where 
and 
. 
Definitions:
Autonomic Arousal
Refers to the automatic activation of the nervous system, including physiological responses like increased heart rate and sweating, typically in response to stress or emotional stimuli.
Subjective Thoughts
Personal ideas, opinions, or beliefs that are based on individual feelings or perspectives rather than facts or evidence.
Polygraph
A device used in lie detection that measures and records several physiological indicators such as blood pressure, pulse, and skin conductivity while the subject is asked questions.
Electrocardiograph
A medical device used to measure the electrical activity of the heart and diagnose various heart conditions.
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