Question

What is the range of the function f(x)=3.2x for the domain {-4,-2,0,2,4}

Answer 1

Option A.
`\{-12.8,-6.4,0,6.4,12.8\}`

Explanation:

we have

`f(x)=3.2x`

we know that

To find the range, substitute each value of x of the domain and find the value of f(x)

so

For
`x=-4` ----->
`f(-4)=3.2(-4)=-12.8`

For
`x=-2` ----->
`f(-2)=3.2(-2)=-6.4`

For
`x=0` ----->
`f(0)=3.2(0)=0`

For
`x=2` ----->
`f(2)=3.2(2)=6.4`

For
`x=4` ----->
`f(4)=3.2(-4)=12.8`

therefore

The range is
`\{-12.8,-6.4,0,6.4,12.8\}`