Question

How do you find the domain and range of `f(x)=2x+4`?

Answer 1

Both the domain and range are all real numbers.

Explanation:

Since the function is defined for all real `x`, we can conclude that the domain is just the real numbers, `D=RR`.

The values of the function go from `-oo` to `oo`, and the function is continuous, which means that values can be all real numbers, so the range is also all real numbers, `R=RR`