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
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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
(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
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
(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
So ,it is a line parallel to Y-axis
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