Use the graph of f (x) = |x| to write an equation for the function represented by

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Use the graph of f (x) = |x| to write an equation for the function represented by each graph.
a.
4 ++x 6. -4 -2+ |(4, –2) -4 -6+ -8+

b.

y (-2, 3) 4 ++++x 2 4 6 -4 -2 -4+
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