document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1182788>Question 1182788</A>: <I><SPAN STYLE=\"word-break: break-all;\"> For each problem, use meaningful variables to write a linear function to model the situation.  Then interpret the slope and y-intercept in words.  Identify which variable would be on the horizontal axis and which one would be on the vertical axis.\r<BR>\n" );
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document.write( "a)  Model the cost if you buy an iPod for $200 and download songs for $1.29 each. \r<BR>\n" );
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document.write( "b)  Model the weekly salary a salesman earns if his salary is a combination of his base salary and commissions on his sales.  His base weekly salary is $500 and he makes $50 for each sale. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #812879 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=812879\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y = 200 + 1.29 * x<BR>\n" );
document.write( "y = total cost.<BR>\n" );
document.write( "x = number of downloaded songs.<BR>\n" );
document.write( "200 = cost of ipod<BR>\n" );
document.write( "1.29 = cost of each downloaded song.\r<BR>\n" );
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document.write( "y = 500 + 50 * x<BR>\n" );
document.write( "y = total compensation.<BR>\n" );
document.write( "x = number of sales.<BR>\n" );
document.write( "500 = base salary per week.<BR>\n" );
document.write( "50 = compensation for each sale.\r<BR>\n" );
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document.write( "the value of y in both cases is on the vertical axis.<BR>\n" );
document.write( "the value of x in both cases is on the horizontal axis.\r<BR>\n" );
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document.write( "here's what each graph looks like.<BR>\n" );
document.write( "first the ipod and songs.<BR>\n" );
document.write( "second the base salary and commission\r<BR>\n" );
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