Question 676499: Domain and range
Answer by MathLover1(20850)   (Show Source):
You can put this solution on YOUR website!
The domain is all the values that x is allowed to take on.
The range is the set of all possible output values (usually y), which result from using the function formula.
example:
the domain and range of the following relation:
(–3, 5), (–2, 5), (–1, 5), (0, 5), (1, 5), (2, 5)
I'll just list the x-values for the domain and the y-values for the range:
domain: –3, –2, –1, 0, 1, 2
range: 5
Is the relation a function?
Yes, this is an example of a "boring" function:
every x-value (each is different) goes to the exact same y-value, but even so
this relation is a function that represents the horizontal line 
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