Final answer:
On a horizontal number line, the number 6 is to the right of 4, indicating that it is greater than 4.
Step-by-step explanation:
On a horizontal number line, the number 6 is located to the right of 4. Since the numbers increase as you move to the right on a horizontal number line, 6 is greater than 4. To understand this concept, imagine a number line where each number to the right is greater than the number to its left. Therefore, 6 being to the right of 4 indicates that it is a larger value.