Posted by **A.W.** on Tuesday, February 17, 2009 at 2:46pm.

What is an non linear equation? Can you please show me an example.? This is all confusing to me.

- Algebra -
**Reiny**, Tuesday, February 17, 2009 at 3:06pm
A linear equation is any equation whose graph is represented by a straight line.

e.g.

y = 3x - 5

or

4x + 5y = 67

the variables of both x and y must be of the first degree, that is, they cannot be squares, or cubes, or square roots, etc.

Anything else is a non-linear equation, which means that their graphs are curves of some type

e.g.

x^2 + y^2 = 100 --- a circle

4x^2 - 3y^2 = 12 --- a hyperbola

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