How do you find the domain and range and is it a function given points {(4,-2), (4,2), (1,-1), (1,1), (0,0)}?

1 Answer
Azimet
Jan 18, 2017

The domain is {0,1,4}
The range is {-2,-1,0,1,2}
This is not a function.

Explanation:

The domain is basically a set containing all possible unique inputs
or x values. The range is a set containing all possible unique outputs or y values. For this set to describe points on a function('s graph), multiple inputs are allowed to yield the same output, however, if even one input can yield multiple outputs, we know for sure that we are not dealing with a function. Here, 4 can either give back -2 or 2and 1 can either give -1 or 1 on the output.

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