Answer:
Domain: All real numbers (or if you want it in interval notation, (-∞, ∞))
Range: (-∞, 1]
Explanation:
Domain means the x values the graph reaches. If you extend the lines of this graph infinitely, you will reach all values of x, since there is no stopping point. Therefore, the domain is all real numbers.
However, for range, there is a limit. This limit is when y = 1. This means the highest value y you can reach on the graph is 1. But, it extends downward infinitely. This means that y ≤ 1. If you put this into interval notation, it is (-∞, 1].