# What Are Direct Relationships on Graphs?

Linear equations express a constant value, or they express a direct or inverse relationship. Constant value equations either take the form of vertical lines (such as x = 3 or x = -2), or horizontal... Read More »
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## What Are Bar Graphs Used for?

Bar graphs are used to compare the relationship between two variables, usually independent and dependent, over a period of time. They are especially good for showing large changes over time of the ... Read More »
http://www.ehow.com/info_8178225_bar-graphs-used.html

## How to Find "Y" in Graphs?

Students begin learning how to graph basic math functions as early as elementary school. Graphs have an important application in mathematical functions in providing an image of two equations. This ... Read More »
http://www.ehow.com/how_8210513_graphs.html

## How to Read Pie Graphs?

Pie charts are the simplest graph for comparing parts of a whole. They are used to show anything that can be broken down into percentages, such as financial data like expenses or the percentage of ... Read More »

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