A linear equation is an equation that represents a line. A linear equation has a variable raised to the 1st power.
For example, Y = 2x, Y = x + 1, Y = 8x - 3 are examples of linear equations.
However, something like [tex]Y =\frac{4}{x}[/tex] and [tex]Y = 6^{x}[/tex] seem to have a variable raised to the 1st power, but they're not linear.
