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Chapter 4 Class 9 Linear Equations in Two Variables

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Updated for new NCERT Book - 2023-2024 Edition.

Get NCERT Solutions of Chapter 4 Class 9 Linear Equations in Two Variables free at Teachoo. You can get solutions of all exercises and examples of the NCERT book.

 

Linear equations are equations where power of the variable is 1. 

For example - x2 + x + 1 = 0 is not a linear equation as power of x is 2. 

But x + y = 1 is a linear equation as power of x and y is 1.

 

We will be studying Linear Equations in 2 variables in this chapter

The topics covered in the chapter are

  • What are Linear Equations in 2 Variables
  • General Form of Linear Equations
  • Finding Solution of a Linear Equation (There are infinite solutions of a linear equation)
  • How to draw a Graph of Linear Equation
  • What is the equation of x-axis and y-axis
  • And equation of lines parallel to x-axis (it is of the form y = k) and equation of lines parallel to y-axis (it is of the form x = k)
  • Equation of line passing through Origin (It is of the form y = mx)

 

Check out the topics and exercises below to start doing the chapter

 

Note: Important questions of each exercise have also been marked

Serial order wise

Ex 4.1
Ex 4.2
Examples
Graph of Linear Equations
Graph of lines x=a, y=b

Concept wise

Definition and General Form of Linear Equation
Solution of linear equation
Graph of linear equations
Forming Equations and drawing graph
Number of lines passing through a point
Lines parallel x or y axis

What's in it?

Updated for new NCERT Book - 2023-2024 Edition.

Get NCERT Solutions of Chapter 4 Class 9 Linear Equations in Two Variables free at Teachoo. You can get solutions of all exercises and examples of the NCERT book.

 

Linear equations are equations where power of the variable is 1. 

For example - x2 + x + 1 = 0 is not a linear equation as power of x is 2. 

But x + y = 1 is a linear equation as power of x and y is 1.

 

We will be studying Linear Equations in 2 variables in this chapter

The topics covered in the chapter are

  • What are Linear Equations in 2 Variables
  • General Form of Linear Equations
  • Finding Solution of a Linear Equation (There are infinite solutions of a linear equation)
  • How to draw a Graph of Linear Equation
  • What is the equation of x-axis and y-axis
  • And equation of lines parallel to x-axis (it is of the form y = k) and equation of lines parallel to y-axis (it is of the form x = k)
  • Equation of line passing through Origin (It is of the form y = mx)

 

Check out the topics and exercises below to start doing the chapter

 

Note: Important questions of each exercise have also been marked