SSC Math 1 | 10th Class | All Practice Set

SSC Math 1

Chapter 1 – Linear Equation In two Variable

An equation which contains two variables and the degree of each term containing variable is one, is called a linear equation in two variables.

When we think about two linear equations in two variables at the same time, they are called simultaneous equations.

Graph of a linear equation in two variables
In the 9th standard we learnt that the graph of a linear equation in two variables is a straight line. The ordered pair which satisfies the equation is a solution of that equation. The ordered pair represents a point on that line.

Two points are sufficient to represent a line, but if co-ordinates of one of the two points are wrong then you will not get a correct line.
If you plot three points and if they are non collinear then it is understood that one of the points is wrongly plotted. But it is not easy to identify the incorrect point. If we plot four points, it is almost certain that three of them will be collinear.

Gabriel Cramer
(31 July, 1704 to 4 January, 1752)
This Swiss mathematician was born in Geneva. He
was very well versed in mathematics, since childhood. At
the age of eighteen, he got a doctorate. He was a professor
in Geneva

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