Question

Which mappings is a function?

A. W

B. X

C. Y

D. Z

Answer 1

The correct answer is B). X

Explanation:

Every function got a set of input values called " Domain " and a set of respective output values as " Range"

And function worked as Function( Input value ) = Output value

There are basic rules for function :

1. There always exist output value for every single input value.

2. Every input value should have one and only one output value

For W :

Rule 2 is violated

Here, Input value 6 result to two output value 2 and 4

For X :

No rule is violated

For Y :

Rule 2 is violated

Here, Input value 6 result to two output value 2 and 6

For Z :

Rule 2 is violated

Here, Input value 7 result to two output value 2 and 8

The correct answer is B). X