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Let Z be the set of integers and N be {xZx0}. For each relation below, 1. Relation {(x,y)ZNy=1x} on Z and N 2. Relation {(x,y)NZy=1x}

Let Z be the set of integers and N be {xZx0}. For each relation below, 1. Relation {(x,y)ZNy=1x} on Z and N 2. Relation {(x,y)NZy=1x} on N and Z 3. Relation {(x,y)ZZzN.y=xz} on Z 4. Relation {(x,y)ZZzN.yxz} on Z which is the best description? A) Just a relation B) A total function C) A partial function

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