Revision Notes For CBSE Class 9 Math Chapter -4 Linear Equations in Two Variables

A Linear equation is an equation between the two variables which forms a straight line when plotted on a graph. The variables are the real numbers and the coefficients may be considered as parameters of the equation

The equation with a homogeneous variable is known as the Linear equation in one variable.

For e.g.: 4x = 9, then x = 9/4. This is an example of a Linear equation in one variable.

The equation with more than one variable is known as a Linear equation in two variables.

For e.g.: 5x+3y = 7. This is an example of the Linear equation in two variable.

A linear equation in two variable is the first-degree equation and it can be written in the form ax + by = c. Here, a and b should not be zero, and a, b, and c should be real numbers. The graph of any equation of this form is a straight line.

CBSE Class 9 Maths Chapter 4 Notes 

For more information about the Linear Equations in Two Variables, click on the below-mentioned links.

Linear Equations In Two Variables Application Of Linear Equations In Two Variables
Pair Of Linear Equation In Two Variables Solving The Linear Equation In Two Or Three Variables

Frequently asked Questions on CBSE Class 9 Maths Notes Chapter 4: Linear Equations in Two Variables


What are linear equations?

Linear equations are equations of the first order. The linear equations are defined for lines in the coordinate system.


What is a ‘Variable’?

A variable is any characteristics, number, or quantity that can be measured or counted.


What are the uses of a graph?

Graphs are a common method to visually illustrate relationships in the data.


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