Linear Equations in Two Variables – Notes

Introduction to Linear Equations in Two Variables

 A linear equation in two variables is of the form ax + by + c = 0

Where a, b, c are real numbers and a  0, b  0.

An ordered pair (x, y) can be considered as solution if it satisfies the equation.

Graphical Representation of Linear Equations in Two Variables

 A linear equation in two variables is represented as a line on the Cartesian plane

A minimum of two points (two ordered pairs) are needed to plot a graph of a linear equation in two variables