Linear Equation is an equation for a straight line. Think that the word LINE is in the word LINEAR.

Two variables--you will see two variables in linear equations, X and Y. The two variables, X and Y, represent the X and Y coordinates on a coordinate grid.

Example of a linear equation y = 2x + 2

Notice the two variables, and that this equation creates a straight line

There are many ways of writing linear equations, but they usually have constants (like "2" or "c") and must have simple variables (like "x" or "y").

Examples: These are linear equations:

y = 3x − 6

y − 2 = 3(x + 1)

y + 2x − 2 = 0

5x = 6

y/2 = 3

***Notice that in each of the examples, there is at least an X or Y variable, but there are never any exponents, square roots, or cube roots!