NCERT Class 9 Solutions: Linear Equation in Two Variable (Chapter 4) Exercise 4.2 – Part 2

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Following figure explains how to find x and y intercepts.

Give figure of finding a and y intercepts,equation is x-2y=4,then meet the (x,y)=(4,-2)

Give Figure of Finding a and Y Intercepts

Give figure of finding a and y intercepts,equation is x-2y=4,then meet the (x,y)=(4,-2)

Q-3 Check which of the following are solutions of the equation and which are not:

  1. (

Solution:

  • Given the equation

  • A point is a solution to this equation, if it lies on the graph of the equation. That is the equation is satisfied when we put in corresponding coordinates and L.H.S R.H.S

  1. Putting and in the L.H.S of the given equation,

    L.H.S R.H.S

    Therefore, is not a solution of this equation.

  2. Putting and in the L.H.S of the given equation,

    L.H.S R.H.S

    Therefore, is not a solution of this equation.

  3. Putting and in the L.H.S of the given equation,

    R.H.S

    Therefore, a solution of this equation.

  4. Putting and in the L.H.S of the given equation,

    L.H.S R.H.S

    Therefore, is not a solution of this equation.

  5. Putting and in the L.H.S of the given equation,

    L.H.S R.H.S

    Therefore, is not a solution of this equation.

Q-4 Find the value of k, if is a solution of the equation

Solution:

  • Give the equation of

  • Since and is a solution to the equation, it must satisfy the equation

    Thus,

  • So, the value of is