document.write( "Question 178657: What is the difference between domain and range? Describe a real-life situation that could be modeled by a function. \n" ); document.write( "

Algebra.Com's Answer #133632 by Mathtut(3670) $\"\"$ $\"About$

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domain is the set of input values in a function
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\n" ); document.write( "range is the set of output values dependent on the domain values.
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\n" ); document.write( "real life situation: lets see there are 1000's of them ....let take your phone for instance. let say you are charged $45 a month and 3 cents a minute for every calls exceeding 500 minutes for the month.\r
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\n" ); document.write( "so the Cost as a funtion of time would be
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\n" ); document.write( "C(t)=45+.03(t-500)
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\n" ); document.write( "obviously this is written so that there is no extra charge for calls at or under 500 minutes that is $\"t%3C=500\"$ \n" ); document.write( "

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