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Please I need help please

Please I need help please-example-1
User TkDodo
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For part a they are both considered functions. For item 1 it is a function because because every x has one corresponding y. For item 2 it is a function because if you take a vertical line and place it on the graph then no matter where on the graph you place the vertical line, the graph should only cross the vertical line once.
User KeatsKelleher
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