Is there a self? (deckard_4)

Race #3788

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Official speed 74.48 wpm (60.90 seconds elapsed during race)
Race Start March 27, 2020 9:39:20pm UTC
Race Finish March 27, 2020 9:40:21pm UTC
Outcome Win (1 of 4)
Accuracy 96.0%
Points 99.30
Text #4180038 (Length: 378 characters)

A relation between two sets X and Y is a set of ordered pairs, each of the form (x, y), where x is a member of X and y is a member of Y. A function from X to Y is a relation between X and Y that has the property that any two ordered pairs with the same x-value also have the same y-value. The variable x is the independent variable, and the variable y is the dependent variable.