The question asks which number line correctly models the sum $-2 + 4$.

1. The first number line starts at $-2$ and moves 4 units to the right, landing at $+2$.
2. The second number line also starts at $-2$, but only moves 3 units to the right, landing at $+1$.

Since $-2 + 4$ equals $+2$, the first number line is the correct model for this addition problem.

Would you like more details, or do you have any other questions?

Here are 5 related questions:

1. How do you use a number line to solve addition and subtraction problems?
2. How does moving left or right on a number line represent negative and positive operations?
3. How would the number line change for $-2 + (-4)$?
4. What is the best strategy for visualizing integer operations on a number line?
5. Can you represent other math operations like multiplication or division on a number line?

Tip: When adding positive integers, move to the right on the number line; when adding negative integers, move to the left.