The interval notation for $x > 8$ is:

$(8, \infty)$

This notation represents all values of $x$ that are greater than 8, but does not include 8 itself, which is why we use a parenthesis instead of a bracket.

Would you like more details on interval notation or have any other questions?

Here are some related questions:

1. How would you write $x \geq 8$ in interval notation?
2. What is the interval notation for $x < 8$?
3. How do you represent $3 \leq x \leq 10$ in interval notation?
4. What is the difference between using parentheses and brackets in interval notation?
5. How would you graph $x > 8$ on a number line?

Tip: In interval notation, parentheses denote that an endpoint is not included, while brackets indicate that it is included.