Question

How do you find the range of `y = 4x - x^2`; given Domain = {-1, -2, 0}?

Answer 1

`y in {-5,-12,0}`

Explanation:

The domain is `x in {-1,-2,0}`
This means that the value of `x` can ONLY be those numbers. (Because of this { } bracket)

So, when we put `x=-1` in `y` then `y=-5`

when we put `x=-2` in `y` then `y=-12`

when we put `x=0` in `y` then `y=0`

Therefore the range is `y in {-12,-5,0}`