Question

What is the domain and range for `f(x) = (4-2x) /5`?

Answer 1

It is a polynomial, so the domain and range are from negative to positive infinity. There are no `x` values for which `y` is undefined, and vice versa.

You can write this as:

`x in (-oo, oo)`
`y in (-oo, oo)`

which means "x and y are in the unbounded domain of negative infinity to positive infinity".

graph{(4 - 2x)/5 [-10, 10, -5, 5]}