How to determine if an equation is linear or not
In this video lesson, we are going to learn how to determine if an equation is linear or not by giving the definition of a linear equation.
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A linear equation in two variables is an equation that can be written in the form
where
and are real numbers, 
and
not both zero.
This means that for an equation to be linear, the following must be satisfied:
a. The exponents of x and y must be both 1.
b. The variables must not appear in the denominator
c. No square roots, cube roots, etc. for the variables
and 
in the following ordered pairs:
and 
are real numbers, 
