SOLUTION: find the range f(x)={(-5,6)(-5,5)(-4,5)(1,-3)} and tell if f is funtion

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Question 454433: find the range f(x)={(-5,6)(-5,5)(-4,5)(1,-3)} and tell if f is funtion
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find the range f(x)={(-5,6)(-5,5)(-4,5)(1,-3)} and tell if f is function
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To be a function, each input (x-value) must have a different output (y-value). Given set of points show that at x=-5, there are two different outputs(6 & 5). Therefore, given set is not a function. The range is [-3,6]