Question

Which of the following is/are example(s) of a function?

• A. Only $\left(1\right)$ and $\left(2\right)$
• B. Only $\left(1\right),\left(2\right)$ and $\left(3\right)$
• C. Only $\left(1\right)$ and $\left(3\right)$
• D. $\left(1\right),\left(2\right),\left(3\right),\left(4\right)$

Answer 1

The correct option is D $\left(1\right),\left(2\right),\left(3\right),\left(4\right)$

For given relation to be function, each element in the domain should have only one image in the co-domain.
All of the four options satisfy the definition of function.