Which mappings is a function?

a. w

b. x

c. y

d. z

The correct answer is B). X

Step-by-step 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

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743