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Coolmath Algebra
Lines Lesson 15 - Graphing Linear Inequalities   (page 2 of 3)
---- This algebra lesson explains how to graph linear inequalities.

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Here's another one:

Graph  2x + y > 4
First, do the line:

the graph of the line 2x + y > 4 ... remember the line is dashed

 We make it a dashed line since there is no =.

So, which side do we shade?

Let's try ( 0 , 0 ):

2x + y > 4 ... 2 ( 0 ) + 0 > 4 ... 0 > 4 ... Nope!

( 0 , 0 ) doesn't work!  That means nothing on that side will work ... So, all the good points must be on the other side!

the graph of 2x + y > 4 ... the portion of the graph above the line is shaded All the points in the shaded region work in

2x + y > 4

 

TRY IT:

Graph x + y > -2

Continued on the next page

 The printing and distribution and/or downloading of these lessons is strictly prohibited.
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