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CBSE Questions for Class 9 Maths Linear Equations In Two Variable Quiz 1 - MCQExams.com

Which of the following equation represents a straight line which is parallel to the x-axis and at a distance 3 units below it?
  • Any line parallel to x-axis and at a distance of 3 units below it is given by y=9
  • Any line parallel to x-axis and at a distance of 3 units below it is given by y=3
  • Any line parallel to x-axis and at a distance of 3 units below it is given by x=3
  • Any line parallel to x-axis and at a distance of 3 units below it is given by x=0
State whether the given statement is true or false:
The graph of a linear equation in two variables need not be a line.
  • True
  • False
The equation x=7, in two variables, can be written as
  • 1.x+1.y=7
  • 1.x+0.y=7
  • 0.x+1.y=7
  • 0.x+0.y=7
Two points with coordinates (2,3) and (2,1) lie on a line. Then (i) the line is parallel to which axis? (ii) Justify your answer.

  • (i)  Parallel to x-axis.

    (ii)  Since x-coordinate of both the points is 2, both points lie on the line y=2 which is parallel to x-axis.
  • (i)  Parallel to y-axis.

    (ii)  Since y-coordinate of both the points is 2, both points lie on the line y=2 which is parallel to y-axis.
  • (i)  Parallel to y-axis.

    (ii)  Since x-coordinate of both the points is 2, both points lie on the line x=2 which is parallel to y-axis.
  • (i)  Parallel to x-axis.

    (ii) Since y-coordinate of both the points is 2, both points lie on the line x=2 which is parallel to y-axis.
Age of x exceeds the age of y by 7yrs. This statement can be expressed as the linear equation as :
  • x+y+7=0
  • xy+7=0
  • xy7=0
  • x+y7=0
How many linear equations in x and y can be satisfied by x=1 and y=2?
  • Only one
  • Two
  • Infinitely many
  • Three
State whether the given statement is true or false:
Every point on the graph of a linear equation in two variables does not represent a solution of the linear equation.
  • True
  • False
The condition that the equation ax+by+c=0 represent a linear equation in two variables is :
  • a0,b=0
  • b0,a=0
  • a=0,b=0
  • a0,b0
The linear equation x=5 in two variables can be written as :
  • 1.x+5=10
  • 0.x+1.y+(5)=0
  • 1.x+0.y+(5)=0
  • 1.x+1.y+(5)=0
Linear equation in one variable is :
  • 2x=y
  • y2=3y+5
  • 4xy=5
  • 3t+5=9t7
Is the following equation linear in two variables?
4x+3y=14
  • Yes
  • No
  • Ambiguous
  • Data Insufficient
State true/false:
One number is 5 more than seven times the other number. It can be represented by x7y=5
  • True
  • False
4x3=0 is a line parallel to 
  • y axis
  • x axis
  • y=x 
  • y=2x 
Express the given information in the form of an equation in mathematical form using two variables: 
The cost of two tables and five chairs is Rs. 2200.
  • 2x+5y=2200
  • x+10y=800
  • 10x5y=1800
  • Insufficient data
Write a linear equation in two variables to represent the following statement.
The age of Jenson is less than the age of Gibin by 6 years
  • x+6=y, where x= age of Jenson and y= age of Gibin
  • x+16=y, where x= age of Jenson and y= age of Gibin
  • x6=y, where x= age of Jenson and y= age of Gibin
  • x+6=2y, where x= age of Jenson and y= age of Gibin
The graph of the equation x=b is also a straight line parallel to _____.
  • y-axis
  • x-axis
  • Cannot be determined
  • Not Parallel
Write the following equation as an equation in two variables:
2x=3
  • 2x+0y+3=0
  • 2x+0y+3=1
  • 2x+2y+3=0
  • 3x+0y+3=0
Write a linear equation in two variables to represent each of the following statement.
5 books and 7 pens together cost Rs 79.
  • 5x + 7y = 79, where x = cost of a book and y = cost of a pen.
  • 4x + 7y = 79, where x = cost of a book and y = cost of a pen.
  • 5x + 6y = 79, where x = cost of a book and y = cost of a pen.
  • 5x - 7y = 79, where x = cost of a book and y = cost of a pen.
Write the following equation as an equation in two variables:
3y=4
  • 0x+3y4=0
  • 0x+2y4=0
  • 0x+3y5=0
  • 2x+3y4=0
A straight line parallel to the x-axis has equation 
  • x=a
  • y=a
  • y=x
  • y=x
The graph of the equation y=a is a straight line parallel to _____
  • x-axis
  • y-axis
  • Cannot be determined
  • Not Parallel
Write a linear equation in two variables to represent the following statement.
The cost of a pen is thrice the cost of a pencil
  • x=3y, where x= cost of a pen and y= cost of a pencil.
  • x=2y, where x= cost of a pen and y= cost of a pencil.
  • 2x=3y, where x= cost of a pen and y= cost of a pencil.
  • x=y, where x= cost of a pen and y= cost of a pencil.
Which of the following equation is not a linear equation?
  • 2x+3=7x2
  • 23x+5=3x4
  • x2+3=5x3
  • (x2)2=x2+8
Write the following equations in the form ax + by + c = 0 
x4=3y
  • x+(3)y+(4)=0
  • x+(3)y+(4)=0
  • x+(3)y+(4)=0
  • 2x+(3)y+(4)=0
Any point on x axis is of the form
  • (x,y)
  • (0,y)
  • (0,0)
  • (x,0)
Write the following equation in the form of ax+by+c=0
5x3y=4
  • 5x+(3)y+(4)=0
  • 5x+(3)y+(4)=0
  • 5x+(3)y+(4)=0
  • 4x+(3)y+(4)=0
Write the following equations in the form ax+by+c=0where a=2,b=3 and c=6
  • 2x+3y6=0
  • x3y+6=0
  • 2x+3y6=0
  • 2x+3y+6=0
Is 5x3y=5 a linear equation in one variable?
  • Yes
  • No
  • Ambiguous
  • Data insufficient
Write the equation 2x=y in the form of ax+by+c=0: 

  • 2x+(1)y+0=0
  • 2x+(1)y+0=0
  • 2x+(1)y+1=0
  • x+(1)y+0=0
What is a linear equation in 2 variables?
  • An equation containing 2 variables raised to the power 1
  • An equation in which the variables are power 2
  • An expression containing 2 variables
  • None of the above
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