The equations will deal with how much something represented by the value on the vertical axis changes as time represented on the horizontal axis passes. We can have two dimensional linear equations and. In this non-linear system users are free to take whatever path through the material best serves their needs.
Frequently linear equations are used to calculate rates such as how quickly a projectile is moving or a chemical reaction is proceeding.
So sometimes they dont like this to start with but if you can rearrange them and make them look like that that thing is linear. An equation that forms a straight line on a graph. Y equals three x squared plus two x minus seven. A solution to this equation was any x y -point that worked in the equation.