# Notes Class 9 Mathematics Chapter 4 Linear Equations in Two Variables

Please refer to Linear Equations in Two Variables Class 9 Mathematics Notes and important questions below. The Class 9 Mathematics Chapter wise notes have been prepared based on the latest syllabus issued for the current academic year by CBSE. Students should revise these notes and go through important Class 9 Mathematics examination questions given below to obtain better marks in exams

## Linear Equations in Two Variables Class 9 Mathematics Notes and Questions

The below Class 9 Linear Equations in Two Variables notes have been designed by expert Mathematics teachers. These will help you a lot to understand all the important topics given in your NCERT Class 9 Mathematics textbook.

Refer to Chapter 4 Linear Equations in Two Variables Notes below which have been designed as per the latest syllabus issued by CBSE and will be very useful for upcoming examinations to help clear your concepts and get better marks in examinations.

1. Linear Equations
2. Solution of a Linear Equation
3. Graph of a Linear Equation in Two Variables
4. Equations of Lines Parallel to x-axis and y-axis
An equation of the form ax + by + c = 0 where a, b and c are real numbers such that a and b are not both zero is called a linear equation in two variables.
A pair of values of x and y which satisfy the equation ax + by + c = 0 is called a solution of the equation.
Graph: The graph of every linear equation in two variables is a straight line. Every point on the graph of a linear equation in two variables is two variables is a solution of the linear
equation. Conversely, every solution of the linear equation is a point on the graph of the linear equation.
A linear equation in two variables has infinitely many solutions.
The graph of every linear equation in two variables is a straight line.
y = 0 is the equation of x-axis and x = 0 is equation of y-axis.
The graph of x = a is a straight line parallel to the y-axis.
The graph of y = a is a straight line parallel to the x-axis.
An equation of the type y = mx represent a line passing through the origin.