To find the domain of a set of points, we look at the x-values of the points, since the domain is the set of all possible input values (x-values) of a function.

Given the points:
(2, 8), (3, 8), (4, 11)

The domain is the set of x-values: $\{2, 3, 4\}$

Let me know if you have any questions or need more details.

Here are 5 related questions:

1. What is the range of the set of points (2, 8), (3, 8), (4, 11)?
2. How do you determine the range of a function from a graph?
3. Can a domain have repeated x-values in a function?
4. What is the domain of a quadratic function like $f(x) = x^2 + 2x - 3$?
5. How do you find the domain of a rational function?

Tip: The domain of a set of points is always found by collecting the x-values, while the range is determined by collecting the y-values.