The values of x and y may be any value on the line, for this function y=f(x). The quick and easy way to share is to write as interval notation:
X for the values in the Domain: (-∞, ∞)
Y values, (numbers) in the Range ; (-∞, ∞)
1) The values of x
In the graph below we have a function, y=f(x).
The values, numbers of x, i.e. the Domain is D =(-∞, ∞) for there are no restrictions and the line is infinite.
The values of y:
The values, numbers of y are also defined as (-∞, ∞) since there are restrictions and may assume any value.
So.
2) We may share our answer as an interval notation
X for the values in the Domain: (-∞, ∞)
Y values, (numbers) in the range ; (-∞, ∞)