How do you find the domain and range and determine whether the relation is a function given :#y=3x#?

1 Answer
Alvin L.
Dec 17, 2017

Domain: #x in RR#
Range: #y in RR#

Explanation:

To find the domain, we look at where the function is defined with real numbers. In this case, all values are defined, so we get a domain of all real numbers, #RR#.

The range is also pretty straight forward. Since the function goes from #-oo# to #oo# and it is continuous, we know that all real numbers are represented on the graph, so the range must also be all real numbers, #RR#.

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