Question 642926
Since each x value maps to one and ONLY ONE y value, this means that this given relation is indeed a function.


If we had x = 2 mapping to both y = 3 and y = 4 at the same time, then this wouldn't be a function (since this x value is mapping to more than one y value). But that's not the case here.


So again, this relation is a function.


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Summary


Is the relation {(1,3),(-4,0),(3,1),(0,4),(2,3)} a function? <font color="red">Yes</font>


Why or why not? <font color="red">See explanation above</font>