To solve $3 - 8$ using a number line, follow these steps:

1. Start at 3 on the number line.
2. Move 8 units to the left because you are subtracting 8.
3. The position where you land is the result.

Number Line Representation:

• Start at 3.
• Moving 8 units left: 2, 1, 0, -1, -2, -3, -4, -5.

So, the answer is $-5$.

Would you like a more detailed explanation, or do you have any other questions?

---

Here are some related questions:

1. How would you represent $5 - 10$ on a number line?
2. What is the result of $2 - 7$ using a number line?
3. How can you use a number line to calculate $4 + (-6)$?
4. What does it mean to subtract a negative number on a number line?
5. How do you find the result of $12 - 15$ using a number line?

Tip: When subtracting a larger number from a smaller one, the result will always be negative.