Question

Given the relation y = -4x2 -8 if the input is 2 what is the output 8 -8 -16 -24

Answer 1

-4x^2 - 8......input (x) = 2

-4(2^2) - 8 =
-4(4) - 8 =
-16 - 8 =
- 24 <==

Answer 2

The correct option is 4.

Explanation:

The given relation is

`y=-4x^2-8`

We have to find the values output if input is 2.

Substitute x=2 in the given relation.

`y=-4(2)^2-8`

Solve the above equation.

`y=-4(4)-8`

`y=-16-8`

`y=-24`

The value of output is -24 at x=2. Therefore the correct option is 4.