# What Are Linear Equations & When Do They Apply?

Linear equations describe a relationship between two variables that have a proportionate relationship, meaning a change in the first variable always produces a proportionate change in the other. Li...
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http://www.ehow.com/info_8148732_linear-equations-do-apply.html

## How to Solve Linear & Non-Linear Equations Then Determine if They Are Linear or Not?

Solving equations, whether linear or nonlinear, is a matter of isolating x on one side of the equation, and numerical coefficients on the other. Specific methods for doing so will vary among equati...
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http://www.ehow.com/how_8429719_solve-then-determine-linear-not.html

## How to Apply Systems of Linear Equations?

A system of equations contains more than one equation with multiple variables that correlate so that the equations can be solved simultaneously. Methods of solving systems include substitution, whe...
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## When do two linear equations give parallel lines?

The form for a linear equation is y = mx + b, where m is the slope. If two linear equations have the same slope, or m, then they produce parallel lines.References:Virtual Math Lab, West Texas A & M...
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http://www.answerbag.com/q_view/2222341

## How to Graph Equations, Linear Equations, Coordinates and Functions?

Some high school math courses require students to be proficient in using a graphic calculator. Many classes ask that students purchase a Texas Instruments calculator such as a TI-83, TI-84 Plus or ...
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http://www.ehow.com/how_8095002_graph-linear-equations-coordinates-functions.html