Answer:
Choice D
Explanation:
The inequality x > 18 says that the value of x needs to be greater than 18. This means x cannot be 18, but any number greater than it.
Now, to show the statement on a number line, we colour all numbers greater than 18 but leave a hole at 18 to show that it is not included. The result is the following:
which we see matches choice D, and therefore it is the correct answer.