Graphing Inequalitites

by Mandy Little

The question that I have is something that looks like this,

x+3
How do you solve for it and how to graph it.

Thank you!
Mandy

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Graphing Inequalitites

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Mar 10, 2010
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Graphing Inequalities
by: Karin

Hi Mandy,

I believe your problem was meant to be written as: y < x+ 3

When you graph inequalities, you first want to graph the line, so think of y < x+ 3 as y = x + 3.

When you graph this line, it will be dotted because of the < sign. This means that there are no solution contained on the line.

Then you have to shade one side of the line to show all of the solutions. (This is what makes inequalities different). Pick one point to substitute into the inequality. I like to use (0,0). When you substitute (0,0), you find that:
0<3. This is a true statement, so you want to shade the side that contains the point (0,0).

This completes the graph for this inequality. The following lesson demonstrates this process a little more clearly:
http://www.algebra-class.com/graphing-inequalities.html

Hope this helps,
Karin

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