# 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 ...
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http://www.ehow.com/info_8178225_bar-graphs-used.html

## Why are graphs used in economics?

Many students who are new to economics become flustered when assessing a simple supply and demand graph. Despite their confusing appearance, graphs explain economics in a way that equations and wor...
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http://www.answerbag.com/q_view/1936749

## 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...
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http://www.ehow.com/info_8503521_direct-relationships-graphs.html

## What are the Advantages & Disadvantages of Using Graphs in Math?

Learning to read and make graphs is an important mathematical skill. In many states, children as young as five are already using simple graphs to help them learn to understand visual representatio...
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http://www.ehow.com/info_8315872_advantages-disadvantages-using-graphs-math.html

## How to Calculate Graphs?

Learning how to calculate graphs correctly can help you interpret data in a variety of ways. Graphs can show relationship between different variables and how they change over time. They can show yo...
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http://www.ehow.com/how_8064878_calculate-graphs.html