The graph of Y
2
is between the graphs of Y
1
and Y
3
for -1 < x < 1. w
EXAMPLE 9 Solving an Inequality Involving Absolute Value
Solve the inequality | x | < 4
SOLUTION
Graph Y
1
= | x | and Y
2
= 4. To graph Y
1
= | x |, enter the Y = menu. With the cursor in
Y
1
, press MATH.
You should see the following on your screen:
Press the right arrow to highlight NUM:
MATH
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