https://file.aiquickdraw.com/mathbot/file/1726699259981ufihebne.jpg

In the image, we see a number line and the question asking which subtraction expression is represented by the model. Here's how to interpret the number line model:

- The arrow starts at -5 and moves to -13. 
- This means we are subtracting a number to move from -5 to -13.

The movement on the number line shows a subtraction of **8** (since -13 is 8 units to the left of -5). The correct expression for this is:

\[
-5 - 8 = -13
\]

Therefore, the correct subtraction expression shown by the number line is **-5 - 8**.

Among the answer options, this seems to match **-4 - 9**, as subtracting 9 from -4 would lead to a similar leftward shift by 9 units, ending at -13.

Would you like further clarification or have any questions? 

Here are five related questions to explore:

1. What is the general rule for interpreting subtraction on a number line?
2. How can we model addition on a number line?
3. Why does moving left on a number line represent subtraction?
4. How would the number line look for a positive subtraction, like -5 - (-8)?
5. Can we solve equations by interpreting movements on a number line?

**Tip:** Always remember that subtracting a positive number on a number line moves you to the left, while subtracting a negative number moves you to the right!

Which subtraction expression does the number line model show?

This lesson explores how to interpret subtraction expressions using a number line model. Understand why -4 - 9 results in -13 by visualizing movements along a number line. Suitable for students in Grades 6-8, covering key subtraction concepts and number line properties.

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