Chapter 1 / Exercise 1.1 / Question 2 /Punjab text book board/ 9th new Math syllabus 2025

A number line is a straight, horizontal line used to represent numbers in order. It helps us visualize how numbers relate to each other—especially in arithmetic, algebra, and real-world measurements.


---

Features of a Number Line:

1. Zero is at the center:

The number 0 is usually marked in the center.



2. Positive numbers go to the right of 0:

Examples: 1, 2, 3, 4, ...



3. Negative numbers go to the left of 0:

Examples: -1, -2, -3, -4, ...



4. Equal spacing:

The distance between any two consecutive numbers is always equal.



5. Can include fractions and decimals:

For example, 0.5, -1.25, ¾ can also be marked between integers.





---

Uses of a Number Line:

To add and subtract numbers.

To understand positive and negative values.

To compare numbers (which is greater or smaller).

To plot rational and irrational numbers.

To visualize solutions in algebra and inequalities.



---

Would you like me to draw a sample number line for you?