Question

Which among the following relations defined on $R$ is/are functions

• A. $\left(i\right)$
• B. $\left(ii\right)$
• C. $\left(iv\right)$
• D. $\left(v\right)$

Answer 1

Answer: (A), (C), (D)

The correct options are
A $\left(i\right)$
C $\left(iv\right)$
D $\left(v\right)$

We know that if a vertical line parallel to $y$ axis for the curve cuts the graph at one point then it represents a function.

$\therefore \left(i\right),\left(iv\right),\left(v\right)$ represents functions