Saturday, 18 September 2021

linear equation in one variable 9th cbse mcqs

9th cbse

1. The linear equation 4x – 10y = 14 has:

a) A unique solution

b) Two solutions

c) Infinitely many solutions

d) No solutions


2. Find the number of solutions of the following pair of linear equations. x + 2y – 8 = 0 and 2x + 4y = 16:

a) 0

b) 1

c) 2

d) Infinite


3. If (2, 0) is a solution of the linear equation 2x +3y = k, then the value of k is:

a) 4

b) 6

c) 5

d) 2


4. The graph of the linear equation 2x +3y = 6 cuts the y-axis at the point:

a) (2, 0)

b) (0, 3)

c) (3, 0)

d) (0, 2)


5. The equation y = 5, in two variables, can be written as:

a) 1 .x + 1 .y = 5

b) 0 .x + 0 .y = 5

c) 1 .x + 0 .y = 5

d)0 .x + 1 .y = 5


6. Any point on the line y = x is of the form:

a) (a, –a)

b) (0, a)

c) (a, 0)

d) (a, a)


7. The graph of x = 5 is a line:

a) Parallel to x-axis at a distance 5 units from the origin

b) Parallel to y-axis at a distance 5 units from the origin

c) Making an intercept 5 on the x-axis

d) Making an intercept 5 on the y-axis


8. x = 9, y = 4 is a solution of the linear equation:

a) 2x + y = 17

b) x + y = 17

c) x + 2y = 17

d) 3x – 2y = 17


9. Any point on the x-axis is of the form:

a) (0, y)

b) (x, 0)

c) (x, x)

d) (x, y)


10. If a linear equation has solutions (–3, 3), (0, 0) and (3, –3), then it is of the form:

a)y – x = 0

b)x + y = 0

c) –2x + y = 0

d) –x + 2y = 0


11. The positive solutions of the equation ax + by + c = 0 always lie in the:

a) 1st quadrant

b) 2nd quadrant

c) 3rd quadrant

d) 4th quadrant


12. The graph of the linear equation 5x + 3y = 10 is a line which meets the x-axis at the point:

a) (0, 3)

b) (3, 0)

c) (2, 0)

d) (0, 2)


13. The point of the form (a, –a) always lies on the line:

a) x = a

b) y = –a

c) y = x

d) x + y = 0


14. The graph of x = 9 is a straight line:

a) Intersecting both the axes

b) parallel to y-axis

c) parallel to x-axis

d) Passing through the origin


15. Equation of the line parallel to x-axis and 6 units above the origin is:

a) x = 6

b) x = –6

c)y = 6

d)y = –6


Question 16
The value of y at x = -1 in the equation 5y = 2 is
(a) 52
(b) 25
(c) 10
(d) 0


Question 17
Equation of a line which is 5 units distance above the x-axis is
(a) x = 5
(b) x + 5 = y
(c) y – 5
(d) x – y = 0


Question 18
x = 3 and y = -2 is a solution of the equation 4px – 3y = 12, then the value of p is
(a) 0
(b) 12
(c) 2
(d) 3


Question 19
Which of the following is the equation of a line parallel to y-axis?
(a) y = 0
(b) x + y = z
(c) y = x
(d) x = a


Question 20
Any point on the line y = 3x is of the form
(a) (a, 3a)
(b) (3a, a)
(c) (a, a3)
(d) (a3, -a)

Question 21
To which equation does the graph represent?

(a) 3x – 7y = 10
(b) y – 2x = 3
(c) 8y – 6x = 4
(d) 5x +352y = 25


Question 22
Any point of the form (a, – a) always lie on the graph of the equation
(a) x = -a
(b) y = a
(c) y = x
(d) x + y = 0


Question 23
The graph of the equation 2x + 3y = 6 cuts the x-axis at the point


(a) (0, 3)
(b) (3, 0)
(c) (2, 0)
(d) (0, 2)


Question 24
Graph of linear equation ax + by + c = 0, a * 0, 6*0 cuts x-axis and y-axis respectively at the points.
(a) (−ca, 0), (0, −cb)
(b) (0, −cb, 0), (−ca, 0)
(c) (-c, 0) (0, -c)
(d) (x, 0) (y, 0)

Question 25
Which of the following ordered pairs is a solution of the equation x – 2y – 6?
(a) (2, 4)
(b) (0, 3)
(c) (-4, 1)
(d) (4, -1)

Question 26
How many linear equation in x and y can be satisfied by x = 1 and y = 2?
(a) only one
(b) two
(c) infinitely many
(d) three

Question 27
Solution of linear equation 2x + 0.y + 9 = 0 is
(a) (92, m)
(b) (n, −92)
(c) (0, −92)
(d) (−92, 0)

Question 28
If (3, 2) is the solution 3x – ky = 5, then k equals of the equation
(a) 2
(b) 4
(c) 3
(d) 12

Question 29
Cost of book (x) exceeds twice the cost of pen (y) by Rs 10. This statement can be expressed as linear equation.
(a) x – 2y – 10 = 0
(b) 2x – y – 10 = 0
(c) 2x + y – 10 = 0
(d) x – 2y + 10 = 0

Question 30
If x represents the age of father and y represents the present age of the son, then the statement for ‘present age of father is 5 more than 6 times the age of the son’ in terms of mathematical equation is
(a) 6x + y = 5
(b) x = 6y + 5
(c) x + 6y = 5
(d) x – 6 = 5

Question 31
Equation of a line passing through origin is
(a) x + y = 1
(b) x = 2y – 4
(c) x + y = 0
(d) y = x – 1

32) The linear equation 3x-11y=10 has:

a. Unique solution

b. Two solutions

c. Infinitely many solutions

D no solution

33) 3x+10 = 0 will has:

a. Unique solution

b. Two solutions

c. Infinitely many solutions

d.No solutions

34) The solution of equation x-2y = 4 is:

a. (0,2)

b. (2,0)

c. (4,0)

d. (1,1)

35) Find the value of k, if x = 1, y = 2 is a solution of the equation 2x + 3y = k.

a. 5

b. 6

c. 7

d. 8

36) Point (3, 4) lies on the graph of the equation 3y = kx + 7. The value of k is:

a. 4/3

b. 5/3

c. 3

d. 4

37) The graph of linear equation x+2y = 2, cuts the y-axis at:

a. (2,0)

b. (0,2)

c. (0,1)

d. (1,1)

38) Any point on line x = y is of the form:

a. (k, -k)

b. (0, k)

c. (k, 0)

d. (k, k)

39) The graph of x = 3 is a line:

a. Parallel to the x-axis at a distance of 3 units from the origin

b. Parallel to the y-axis at a distance of 3 units from the origin

c. Makes an intercept 3 on the x-axis

d. Makes an intercept 3 on the y-axis

41.. Int. Any equation of the form ax + by + c = 0 where a, b and c are real numbers and a and b are not both zero is called a ————-

A. Linear equations in two variables
B. Quadratic equations in two variables
C. Cubic equation in two variables

42 The equation y = 2 in two variables can be written as ——————

A. 0 .x + 1 .y = 2
B. 1. x + 0. y = 2
C. 1. x + 0 .y = 0

43. A linear equation in two variables has ———– solutions.

A. One solution
B. Finite solutions
C. Infinitely many solutions

44. Which of the following is not a solution of the equation 2x + y = 7

A. (0, 7)
B. (1, 4)
C. (2, 3)

45. The value of k, if x = 2, y = 1 is a solution of the equation 2x + 3y = k is ———

A. 5
B. 6
C. 7

46. The graph of the equation of the form y = kx is a line which always passes through the ————-

A. x axis
B. y axis
C. Origin

47. If the point (3, 4) lies on the graph of the equation 3y = ax + 7, then the value of a is ————-

A. 3/5
B. 5/3
C. 3/7

48. The graph of every linear equation in two variables is a ——–

A. Straight line
B. Curved figure
C. open curve

49. The graph of x = a is a straight line parallel to the ——— axis.

A. x axis
B. y axis
C. None of these

50. The graph of y = a is a straight line parallel to the ——— axis.

A. x axis
B. y axis
C. None of these

51. Any point on the x axis is of the form ————

A. (x, 0)
B. (0, x)
C. (0, y)

52. The equation of y axis is of the form —————

A. y = 0
B. x = 0
C. x = 1

53. The graph of y = 3 is a line ————-

A. Parallel to x axis at distance 3 units from the origin.
B. Parallel to y axis at distance 3 units from the origin.
C. None of these

54. x = 4, y=3 is a solution of the linear equation:

A. 2x + y = 17
B. 2x + 3y = 17
C. x + 3y = 17

55. Solution of the equation 3x – 5 = 2x + 1is —————-

A. 5
B. 6
C. 7

ercept

b. Slope

c. Solution of the equation

d. None of the above


56) If x and y are both positive solutions of equation ax+by+c=0, always lie in the:

a. First quadrant

b. Second quadrant

c. Third quadrant

d. Fourth quadrant


57) A linear equation in two variables is of the form ax + by + c = 0, where

(a) a = 0, c = 0

(b) a ≠ 0, b = 0

(c) a = 0, b ≠ 0

(d) a ≠ 0, b ≠ 0

58) Any point on the x-axis is of the form

(a) (x, y)

(b) (0, y)

(c) (x, 0)

(d) (x, x)


59) Any point on the y-axis is of the form

(a) (y, y)

(b) (0, y)

(c) (x, y)

(d) (x, 0)

60) The linear equation 2x – 5y = 7 has

(a) No solution

(b) unique solution

(c) Two solutions

(d) Infinitely many solutions

61) The linear equation 3x – y = x – 1 has

(a) No solution

(b) unique solution

(c) Two solutions

(d) Infinitely many solutions

62) The graph of the linear equation 2x + 3y = 6 cuts the y-axis at the point

(a) (2, 0)

(b) (0, 2)

(c) (3, 0)

(d) (0, 3)

63) The equation 2x + 5y = 7 has a unique solution, if x, y are:

(a) Rational numbers

(b) Real numbers

(c) Natural numbers

(d) Positive real numbers

64) The point of the form (a, a) always lies on:

(a) On the line x + y = 0

(b) On the line y = x

(c) x-axis

(d) y-axis

65) If we multiply or divide both sides of a linear equation with the same non-zero number, then the solution of the linear equation:

(a) Remains the same

(b) Changes

(c) Changes in case of multiplication only

(d) Changes in case of division

66) If (2, 0) is a solution of the linear equation 2x + 3y = k, then the value of k is

(a) 2

(b) 4

(c)

67. The linear equation 3x-11y=10 has:
a) Unique solution
b) Two solutions
c) Infinitely many solutions
d) No solutions

68. 3x+10 = 0 will has:
a) Unique solution
b) Two solutions
c) Infinitely many solutions
d) No solutions

69. The solution of equation x-2y = 4 is:
a) (0,2)
b) (2,0)
c) (4,0)
d) (1,1)

70. The value of k, if x = 1, y = 2 is a solution of the equation 2x + 3y = k.
a) 5
b) 6
c) 7
d) 8

71. Point (3, 4) lies on the graph of the equation 3y = kx + 7. The value of k is:
a) 4/3
b) 5/3
c) 3
d) 7/3

72. The graph of linear equation x+2y = 2, cuts the y-axis at:
a) (2,0)
b) (0,2)
c) (0,1)
d) (1,1)

73. Any point on the line x = y is of the form:
a) (k, -k)
b) (0, k)
c) (k, 0)
d) (k, k)

74. The graph of x = 3 is a line:
a) Parallel to x-axis at a distance of 3 units from the origin
b) Parallel to y-axis at a distance of 3 units from the origin
c) Makes an intercept 3 on x-axis
d) Makes an intercept 3 on y-axis

75. In equation, y = mx+c, m is:
a) Intercept
b) Slope of the line
c) Solution of the equation
d) None of the above

76. If x and y are both positive solutions of equation ax+by+c=0, always lie in:
a) First quadrant
b) Second quadrant
c) Third quadrant
d) Fourth quadrant

77. The linear equation 4x – 10y = 14 has:
a) A unique solution
b) Two solutions
c) Infinitely many solutions
d) No solutions

78. Find the number of solutions of the following pair of linear equations. x + 2y – 8 = 0 and 2x + 4y = 16:
a) 0
b) 1
c) 2
d) Infinite

79. If (2, 0) is a solution of the linear equation 2x +3y = k, then the value of k is:
a) 4
b) 6
c) 5
d) 2

80. The graph of the linear equation 2x +3y = 6 cuts the y-axis at the point:
a) (2, 0)
b) (0, 3)
c) (3, 0)
d) (0, 2)

81. The equation y = 5, in two variables, can be written as:
a) 1 .x + 1 .y = 5
b) 0 .x + 0 .y = 5
c) 1 .x + 0 .y = 5
d)0 .x + 1 .y = 5

82. Any point on the line y = x is of the form:
a) (a, –a)
b) (0, a)
c) (a, 0)
d) (a, a)

83. The graph of x = 5 is a line:
a) Parallel to x-axis at a distance 5 units from the origin
b) Parallel to y-axis at a distance 5 units from the origin
c) Making an intercept 5 on the x-axis
d) Making an intercept 5 on the y-axis

84. x = 9, y = 4 is a solution of the linear equation:
a) 2x + y = 17
b) x + y = 17
c) x + 2y = 17
d) 3x – 2y = 17

85. Any point on the x-axis is of the form:
a) (0, y)
b) (x, 0)
c) (x, x)
d) (x, y)

86. If a linear equation has solutions (–3, 3), (0, 0) and (3, –3), then it is of the form:
a)y – x = 0
b)x + y = 0
c) –2x + y = 0
d) –x + 2y = 0

87. The positive solutions of the equation ax + by + c = 0 always lie in the:
a) 1st quadrant
b) 2nd quadrant
c) 3rd quadrant
d) 4th quadrant

88. The graph of the linear equation 5x + 3y = 10 is a line which meets the x-axis at the point:
a) (0, 3)
b) (3, 0)
c) (2, 0)
d) (0, 2)

89. The point of the form (a, –a) always lies on the line:
a) x = a
b) y = –a
c) y = x
d) x + y = 0

90. The graph of x = 9 is a straight line:
a) Intersecting both the axes
b) parallel to y-axis
c) parallel to x-axis
d) Passing through the origin

91. Equation of the line parallel to x-axis and 6 units above the origin is:
a) x = 6
b) x = –6
c)y = 6
d)y = –6

92.   Through which of the following points, the graph of y = –x passes?

      (i) (1, 1)

(ii) (0, 1)

(iii) (–1, 1)

93.   Through which of the following points, the graph of the linear equation 3x – 2y = 0, passes?

       


94.   On which of the following equations, the point of the form (m, –m) lies?

      (i) x = –m

(ii) x + y = 0

(iii) y = x

95.   Do the points (2, 0), (–3, 0), (0, 2), (0, –5) lie either on x-axis or y-axis?

96.   Which equation�s graph is at a distance 3 units to the left of y-axis?

      x = 3; x = –3; or y = x

97.   The graph of which of the following equations passes through the origin?

      (i) y = 2x + c

(ii) y = 2x – c

(iii) y = 2x

.98..Any equation of the form ax + by + c = 0 where a, b and c are real numbers and a and b are not both zero is called a ————-

A. Linear equations in two variables
B. Quadratic equations in two variables
C. Cubic equation in two variables

99. The equation y = 2 in two variables can be written as ——————

A. 0 .x + 1 .y = 2
B. 1. x + 0. y = 2
C. 1. x + 0 .y = 0

100. A linear equation in two variables has ———– solutions.

A. One solution
B. Finite solutions
C. Infinitely many solutions

101. Which of the following is not a solution of the equation 2x + y = 7

A. (0, 7)
B. (1, 4)
C. (2, 3)

102.. The value of k, if x = 2, y = 1 is a solution of the equation 2x + 3y = k is ———

A. 5
B. 6
C. 7

103. The graph of the equation of the form y = kx is a line which always passes through the ————-

A. x axis
B. y axis
C. Origin

105. If the point (3, 4) lies on the graph of the equation 3y = ax + 7, then the value of a is ————-

A. 3/5
B. 5/3
C. 3/7

106. The graph of every linear equation in two variables is a ——–

A. Straight line
B. Curved figure
C. open curve

107. The graph of x = a is a straight line parallel to the ——— axis.

A. x axis
B. y axis
C. None of these

108 The graph of y = a is a straight line parallel to the ——— axis.

A. x axis
B. y axis
C. None of these

109. Any point on the x axis is of the form ————

A. (x, 0)
B. (0, x)
C. (0, y)

110. The equation of y axis is of the form —————

A. y = 0
B. x = 0
C. x = 1

111. The graph of y = 3 is a line ————-

A. Parallel to x axis at distance 3 units from the origin.
B. Parallel to y axis at distance 3 units from the origin.
C. None of these

112. x = 4, y=3 is a solution of the linear equation:

A. 2x + y = 17
B. 2x + 3y = 17
C. x + 3y = 17

113 Solution of the equation 3x – 5 = 2x + 1is —————-

A. 5
B. 6
C. 7










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