# Chapter 4.Linear Equations in Two variables

1. An equation of the form ax + by + c = 0, where a, b and c are real numbers, such that a and

b are not both zero, is called a linear equation in two variables.

2. A linear equation in two variables has infinitely many solutions.

3. The graph of every linear equation in two variables is a straight line.

4. x = 0 is the equation of the y-axis and y = 0 is the equation of the x-axis.

5. The graph of x = a is a straight line parallel to the y-axis.

6. The graph of y = a is a straight line parallel to the x-axis.

7. An equation of the type y = mx represents a line passing through the origin.

8. Every point on the graph of a linear equation in two variables is a solution of the linear

equation. Moreover, every solution of the linear equation is a point on the graph of the linear equation.

Chapter 3 Coordinate Geometry

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