Question 206466

If x and y are integers, find the domain of {(x,y):/y/=x and x <or= 4}. Graph the relation. Is it a function?
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Domain: Since |y| is never negative,
domain is all Real numbers >= zero.
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Can't graph this relation on this site.
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Is it a function? 
No, because the relation has pairs of points like (2,2) and (2,-2)
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Cheers,
Stan H.