CBSE  /  Class 9  /  Maths  /  Linear Equations for Two Variables

  • 1. 
    How many linear equation in x and y can be satisfied by x = 1 and y = 2?

  • only one
  • two
  • infinitely many
  • three

  • 2. 
    Solution of linear equation 2x + 0.y + 9 = 0 is

  • (\(\frac{9}{2}\), m)
  • (n, \(\frac{-9}{2}\))
  • (0, \(\frac{-9}{2}\))
  • (\(\frac{-9}{2}\), 0)

  • 3. 
    If (3, 2) is the solution 3x - ky = 5, then k equals of the equation

  • 2
  • 4
  • 3
  • \(\frac{1}{2}\)

  • 4. 
    Cost of book (x) exceeds twice the cost of pen (y) by Rs 10. This statement can be expressed as linear equation.

  • x - 2y - 10 = 0
  • 2x - y - 10 = 0
  • 2x + y - 10 = 0
  • x - 2y + 10 = 0

  • 5. 
    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

  • 6x + y = 5
  • x = 6y + 5
  • x + 6y = 5
  • x - 6 = 5

  • 6. 
    Equation of a line passing through origin is

  • x + y = 1
  • x = 2y - 4
  • x + y = 0
  • y = x - 1

  • 7. 
    The condition that the equation ax + by + c = 0 represents a linear equation in two variables is

  • a ≠ 0, b = 0
  • b ≠ 0, a = 0
  • a = 0, b = 0
  • a ≠ 0, b ≠ 0

  • 8. 
    The maximum number of points that lie on the graph of a linear equation in two variables is.

  • two
  • definite
  • infinitely many
  • three

  • 9. 
    Straight line passing through the points (-1, 1), (0, 0) and (1, -1) has equation

  • y - x
  • x + y = 0
  • y = 2x
  • 2 + 3y = 7x

  • 10. 
    The value of y at x = -1 in the equation 5y = 2 is

  • \(\frac{5}{2}\)
  • \(\frac{2}{5}\)
  • 10
  • 0
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