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How do you "find the range of a function for a given domain ?

This is a set of review problems, and I don't remember how to start. The firat problem looks like this:
 
f(x) = 3x + 2
 

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Vivian L. | Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACHMicrosoft Word/Excel/Outlook, essay comp...
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Hi Christine;
The domain is all the values of x this equation can accommodate.  There are no limitations on x, such as if it is positioned within a denominator thereby eliminating x=0.
DOMAIN...(-infinity, +infinity)
 
f(x)=y is the range.  This is all possible values of y.  Since there is nothing limiting x, there is nothing limiting its equation results...
RANGE...(-infinity, +infinity)
 
What are the other problems?