document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=698529>Question 698529</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A subway pass costs $20.00 and $1.50 is deducted from the balance on the pass every time you use it. Write the equation to represent this situation, and graph it. <BR>\n" );
document.write( "I copied the question from my textbook. Thanks in advance. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #430778 by </B><A HREF=/tutors/aboutme.mpl?userid=neatmath><B>neatmath(302)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=neatmath><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=neatmath><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=430778\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><font face=\"Tahoma\">We will let x be the number of times you use the pass,<br>\r<BR>\n" );
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document.write( "and let y be the total value left on the pass.<br>\r<BR>\n" );
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document.write( "Then we have:<br>\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-1.5%2Ax%2B20 ALIGN=MIDDLE  ALT=\"y=-1.5%2Ax%2B20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br>\r<BR>\n" );
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document.write( "The slope of this line is -1.5,<br>\r<BR>\n" );
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document.write( "and the y-intercept is 20, or the actual point (0,20)<br>\r<BR>\n" );
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document.write( "Graphically, you can see that you will only be able to use the pass about 13 times.<br>\r<BR>\n" );
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document.write( "You can also solve that algebraically by setting y equal to zero.<br><br>\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+600%2C+600%2C+-24%2C+24%2C+-24%2C+24%2C+-1.5x%2B20+%29+ ALIGN=MIDDLE  ALT=\"+graph%28+600%2C+600%2C+-24%2C+24%2C+-24%2C+24%2C+-1.5x%2B20+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <br><br>\r<BR>\n" );
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document.write( "I hope this helps!  Keep practicing!  :)<br>\r<BR>\n" );
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