Answer:
the domain is all real numbers or (-∞,∞)
the range is all real numbers less than or equal to four or y≤4
Explanation:
since the graph will continue to grow all the x values will be used.
the range is stopped at four and goes down. since its increasing toward -∞, the range stops at four, but touches it. Also didn't know if you needed the range so i just put it :)