Which of the following is a function?
Understand the Problem
The question is asking to identify which option among the provided choices represents a function. A function is a relationship where each input has a unique output, usually evaluated based on certain criteria or definitions.
Answer
Any relation where each element in the domain maps to a unique element in the co-domain, such as y = |x|.
The final answer is any option where each element in the domain has a unique image in the co-domain, such as y = |x|.
Answer for screen readers
The final answer is any option where each element in the domain has a unique image in the co-domain, such as y = |x|.
More Information
To qualify as a function, every element in the domain must correspond to exactly one element in the co-domain. For example, y=|x| satisfies this condition.
Tips
A common mistake is to assume a relation is a function when an element in the domain corresponds to multiple elements in the co-domain.
Sources
- Which of the following is/are functions? - BYJU'S - byjus.com
- Which of the following are functions ? - BYJU'S - byjus.com
- Which of the following is a function ? - Doubtnut - doubtnut.com
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