What is the domain and range of y=−1?

1 Answer
Andrés G.
Apr 8, 2017

Domain = ℝ
Range = {−1}

Explanation:

The domain is how much the function takes x-wise, in the horizontal axis. As y=−1 is a horizontal line at y=−1, horizontally-wise it takes all real numbers, from −∞ to +∞ Therefore, the domain is ℝ.

The range is how much the function takes y-wise, in the horizontal axis. As y=−1 is a horizontal line at y=−1, vertically-wise it takes only -1. Therefore, the range is {−1}

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