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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