**NCERT Solutions for Class
9 Maths Chapter 4 Linear Equations in Two Variables Ex 4.4**

NCERT Solutions for Class
9 Maths Chapter 4 Linear Equations in Two Variables Ex 4.4 are the part of
NCERT Solutions for Class 9 Maths. Here you can find the NCERT Solutions for
Class 9 Maths Chapter 4 Linear Equations in Two Variables Ex 4.4.

**NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables Ex 4.1****NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables Ex 4.2****NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables Ex 4.3****NCERT Solutions for Class 9 Maths Chapter 4 Linear Equations in Two Variables Ex 4.4**

**Ex 4.4 Class
9 Maths Question
1.**

**Give the geometric representations of y = 3 as an equation**

**(i)**in one variable

**(ii)**in two variables

**Solution:
(i) **y = 3

∵ y = 3 is an equation in one variable, i.e., y only.

∴ y = 3 is a unique solution on the number line as shown below:

**(ii)**
y = 3

We can write y = 3 in two variables as 0.x + y = 3

Now, when x = 1, we have y = 3.

When x = 2, we have y = 3

When x = -1, we have y = 3

∴ We get the following table:

x |
1 |
2 |
-1 |

y |
3 |
3 |
3 |

Plotting the ordered pairs (1, 3), (2, 3) and (-1,
3) on a graph paper and joining them, we get a line AB as solution of 0.x + y =
3, i.e., y = 3.

**Ex 4.4 Class 9 Maths Question
2.**

**Give the geometric representations of 2x + 9 = 0 as an equation**

**(i)**in one variable

**(ii)**in two variables

**Solution:
(i) **2x + 9 = 0

We have, 2x + 9 = 0

⇒ 2x = – 9

⇒ x = −9/2

This is a linear equation in one variable, i.e., x only.

Therefore,
x = −9/2 is a unique solution of 2x + 9 = 0.

The
geometrical representation of 2x + 9 = 0 is shown below:

**(ii)** 2x + 9 = 0

We can write 2x + 9 = 0 in two variables as 2x + 0.y + 9 = 0

or x = −9/2 − 0.y/2

∴ When y = 1, x = −9/2

When
y = 2, x = −9/2

When
y = 3, x = −9/2

Thus, we have the following table:

x |
-9/2 |
-9/2 |
-9/2 |

y |
1 |
2 |
3 |

Now, plotting the ordered pairs (−9/2, 1), (−9/2, 2) and (−9/2, 3) on a graph paper and joining them, we get a
line PQ as solution of 2x + 9 = 0.

**NCERT Solutions for Maths Class 10**