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NCERT Solution for Linear equation Chapter 4 Exercise 4.4




In this page we have NCERT book Solutions for Class 9th Maths Linear equations in two variables for EXERCISE 4.4 on page 77. Hope you like them and do not forget to like , social share and comment at the end of the page.
Question 1
Give the geometric representations of y = 3 as an equation
(i) in one variable
(ii) in two variables
Solution
(i) The representation of the y=3 on the number line is shown in below figure where y=3 is treated as an equation in one variable
Class 9 Maths NCERT Solution for Linear equations in two Variables Chapter 4 Exercise 4.4 Question 1

(ii) This can be treated as equation in two variable as
$ 0 \times x + y =3$
Drawing the graph by putting x=0 and x=1
Class 9 Maths NCERT Solution for Linear equations in two Variables Chapter 4 Exercise 4.4 Question 1

Class 9 Maths NCERT Solution for Linear equations in two Variables Chapter 4 Exercise 4.4 Question 1

So ,it is a line parallel to X-axis


Question 2
Give the geometric representations of 2x + 9 = 0 as an equation
(i) in one variable
(ii) in two variables
Solution
(i) The representation of the $2x+9=0$ on the number line is shown in below figure where x=-9/2 =4.5 is treated as an equation in one variable
Class 9 Maths NCERT Solution for Linear equations in two Variables Chapter 4 Exercise 4.4 Question 2

(ii) This can be treated as equation in two variable as
$ 2x + 0 \times y +9=0$
Drawing the graph by putting y=0 and y=2
Class 9 Maths NCERT Solution for Linear equations in two Variables Chapter 4 Exercise 4.4 Question 2

Class 9 Maths NCERT Solution for Linear equations in two Variables Chapter 4 Exercise 4.4 Question 2

So ,it is a line parallel to Y-axis

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