EASY
9th Telangana Board
IMPORTANT
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In countries like USA and Canada temperature is measured in Fahrenheit whereas in countries like India, it is measured in Celsius. Here is a linear equation that converts Fahrenheit to Celsius F=95C+32. If the temperature is 95°F what is the temperature in Celsius?

Important Points to Remember in Chapter -1 - Linear Equations in Two Variables from Telangana Board Mathematics Class 9 Solutions

1. Standard Form of Linear Equation in Two Variables:

An equation of the form ax+by+c=0, where a, b, c are real numbers such that a and b are not zero is called a linear equation in two variables.

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

3. Graphical Representation of Linear Equation in Two Variables:

(i) The graph of a linear equation in two variables is a straight line.

(ii) The equations of x-axis and y-axes are y=0 and x=0 respectively.

(iii) The graph of the equation x=a is a straight line parallel to y-axis.

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(iv) The graph of the equation y=a is a straight line parallel to x-axis.

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(v) Every point on the graph of a linear equation in two variables is a solution of the equation. Conversely, every solution of the linear equation in two variables represents a point on the graph of the equation.