3. Section 11.3
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Start with determining the boundary line. Then test a point to decide which side of the boundary line should be shaded.
Graphing an absolute value inequality involves two main steps.
To graph the given absolute value function, let's make a table of values first!
x | |x-2|+1 | Simplify | y=|x-2|+1 |
---|---|---|---|
0 | | 0-2|+1 | 2+1 | 3 |
1 | | 1-2|+1 | 1+1 | 2 |
2 | | 2-2|+1 | 0+1 | 1 |
3 | | 3-2|+1 | 1+1 | 2 |
4 | | 4-2|+1 | 2+1 | 3 |
We will plot these ordered pairs on a coordinate plane and connect them to get the graph of the given function. Notice that the function is a transformation of the parent function f(x)=|x|, which is V-shaped. Thus, the given function will also be a V-shaped graph.
In order to decide which part of the plane to shade, we can test a point which is not on the boundary line. Let's test the point ( 0, 0).