document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1164911>Question 1164911</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The cost of printing digital pictures is given by y = 0.13x, where x is the number of pictures that you print and y is the cost in dollars.<BR>\n" );
document.write( "a) Determine the domain and range of this relation.  Why is the relation a function?<BR>\n" );
document.write( "b) Write the equation in function notation.  Interpret the function in terms of the context.<BR>\n" );
document.write( "c) Find f(5) and f(12).  What do these values represent?   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #789348 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=789348\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the domain is the value of x can be any integer greater than zero.<BR>\n" );
document.write( "the value of x can't be negative since the number of digital prints can't be negative.<BR>\n" );
document.write( "the value of x can't be 0 since since you don't go into a store to make 0 prints.\r<BR>\n" );
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document.write( "the range is the value of y greater than or equal to .13 in increments of .13.\r<BR>\n" );
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document.write( "the relationship between x and y is a function because each and every value of x results in one and only one distinct value of y.\r<BR>\n" );
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document.write( "in function notation, y = .13 * x is written as f(x) = .13 * x\r<BR>\n" );
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document.write( "f(5) replaces x with 5 to get f(5) = .13 * 5 = .65<BR>\n" );
document.write( "it tells you to evaluate the function when x = 5.<BR>\n" );
document.write( "x = 5 means you printed 5 digital pictures.<BR>\n" );
document.write( "f(5) means it cost you 65 cents to print 5 digital pictures.\r<BR>\n" );
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document.write( "f(12) replaces x with 12 to get f(12) = .13 * 12 = 1.56<BR>\n" );
document.write( "it tells you to evaluate the function when x = 12.<BR>\n" );
document.write( "x = 12 means you printed 12 digital pictures.<BR>\n" );
document.write( "f(12) means it cost you 1 dollar and 56 cents to print 12 digital pictures.\r<BR>\n" );
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document.write( "since x had to be an integer, it was impossible to get a value of y that was not in increments of .13<BR>\n" );
document.write( "in fact, the number of increments of .13 is given by the value of x.\r<BR>\n" );
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