# SOLUTION: Which if the following is a function? [(-4,1),(1,8),(-4,-2)] [(-4,1),(1,-8),(-2,-2)] [(-4,1),(1,-8),(1,-2)]

Algebra ->  Algebra  -> Rational-functions -> SOLUTION: Which if the following is a function? [(-4,1),(1,8),(-4,-2)] [(-4,1),(1,-8),(-2,-2)] [(-4,1),(1,-8),(1,-2)]      Log On

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 Question 148812This question is from textbook Glencoe Algebra 2 : Which if the following is a function? [(-4,1),(1,8),(-4,-2)] [(-4,1),(1,-8),(-2,-2)] [(-4,1),(1,-8),(1,-2)]This question is from textbook Glencoe Algebra 2 Found 2 solutions by stanbon, nerdybill:Answer by stanbon(57311)   (Show Source): You can put this solution on YOUR website![(-4,1),(1,-8),(-2,-2)] is a function because each x-value has only one y-value. ============= Cheers, Stan H. Answer by nerdybill(6958)   (Show Source): You can put this solution on YOUR website!For it to be a function, there must be a unique 'y' for every 'x'. . So, in the case of your problem: [(-4,1),(1,8),(-4,-2)] [(-4,1),(1,-8),(-2,-2)] [(-4,1),(1,-8),(1,-2)] . Set 1: when x=-4 there are two possible y's Set 3: when x=1 there are two possible y's . Therefore the only set that can be a function is Set 2.