An equation of a straight lines is said to be linear equation. Linear equation is an equation between two variables which when plotted on a graph gives a straight line.
A general form a linear equation is:
Ax + By + C = 0
Where, x and y are the variables and A, B and C are the constants. In a linear equation variables like x and y does not have exponents.
For example: y = 2x – 1
x