Graphs of Linear Equations
Key Questions

A table is just a basic way of organizing data into rows and columns. If you have some information like high temperature for each day of the year your table might look like this:
<pre>
DAY High Temperature (ºC)
January 1 2
January 2 5
January 3 7
</pre>You could write this out in text like this: "On January first the high temperature was 2 degrees celsius. On January second the high temperature was seven degrees colder...." The problem with this is that it makes it very difficult to understand the information and takes a lot of text. A well organized table allows you to quickly scan through a set of data and see simple trends. It also stores information very efficiently and makes it easy to update without making errors.
If you're doing simple graphing for a math class, the headings of the columns will be more boring things like X and Y.
<pre>
X Y
0 0
1 2
2 4
3 9
</pre> 
This questions is a bit confusing, but I think I know what you're saying.
A linear equation, when graphed, is always a straight line. So if you had two variables, your equation would look something like this:
y = 3x + 4
The "y" technically is another variable, but by putting the equation into this form, it does not matter anymore.
On a graph, a linear equation would begin somewhere on the yaxis and continue in a straight line in any direction from there.
Hope this helped

The easiest way to sketch the graph of a linear equation is to find any two distinct points on the graph such as intercepts, then draw a straight line through them.
I hope that this was helpful.
Questions
Graphs of Linear Equations and Functions

Graphs in the Coordinate Plane

Graphs of Linear Equations

Horizontal and Vertical Line Graphs

Applications of Linear Graphs

Intercepts by Substitution

Intercepts and the CoverUp Method

Slope

Rates of Change

SlopeIntercept Form

Graphs Using SlopeIntercept Form

Direct Variation

Applications Using Direct Variation

Function Notation and Linear Functions

Graphs of Linear Functions

Problem Solving with Linear Graphs