The graph of $-4 \leq x \leq 4$ on a number line represents a segment. This is because it includes all values of $x$ between -4 and 4, and both endpoints, -4 and 4, are included (since the inequalities are "less than or equal to"). A segment is a part of a line that has two definite endpoints.

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Here are 5 related questions:

1. How do you graph inequalities on a number line?
2. What is the difference between a ray and a line segment?
3. How would the graph of $x > -4$ look on a number line?
4. Can a point ever represent an interval on a number line?
5. What is the significance of open versus closed intervals in graphs?

Tip: A line segment has two fixed endpoints, while a ray has only one endpoint and extends infinitely in one direction.