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The relations from the following sets of ordered pairs which is a function is; {(8,1),(−4,1),(3,5),(0,4),(−1,2)}
It follows from the definition of a function that a function from an array of X-values to a set Y-values assigns only one Y-value to each X-value.
Hence, it follows from the definition above that the relation; {(8,1),(−4,1),(3,5),(0,4),(−1,2)} is that which is a function.
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