document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1196855>Question 1196855</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A phone company has a monthly cellular data plan  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #829878 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=829878\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "use given data to find linear equation\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=mx%2Bb ALIGN=MIDDLE  ALT=\"y=mx%2Bb\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "if a phone company has a monthly cellular data plan where a customer pays a flat monthly fee of $<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10 ALIGN=MIDDLE  ALT=\"10\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+b=10 ALIGN=MIDDLE  ALT=\"+b=10\"   DISABLED_style= \"max-width:90%; height:auto;\" >  \r<BR>\n" );
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document.write( "and then a certain amount of money per megabyte (MB) of data used on the phone, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x ALIGN=MIDDLE  ALT=\"x\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " If a customer uses <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%5D=20 ALIGN=MIDDLE  ALT=\"x%5B1%5D=20\"   DISABLED_style= \"max-width:90%; height:auto;\" > MB, the monthly cost will be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%5B1%5D=11.20 ALIGN=MIDDLE  ALT=\"y%5B1%5D=11.20\"   DISABLED_style= \"max-width:90%; height:auto;\" >. <BR>\n" );
document.write( "If the customer uses <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B2%5D=130 ALIGN=MIDDLE  ALT=\"x%5B2%5D=130\"   DISABLED_style= \"max-width:90%; height:auto;\" > MB, the monthly cost will be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%5B2%5D=17.80 ALIGN=MIDDLE  ALT=\"y%5B2%5D=17.80\"   DISABLED_style= \"max-width:90%; height:auto;\" >}.\r<BR>\n" );
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document.write( "so, we have two points to find a slope\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m=%2817.80-11.20%29%2F%28130-20%29=0.06 ALIGN=MIDDLE  ALT=\"m=%2817.80-11.20%29%2F%28130-20%29=0.06\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "your equation is:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=0.06x%2B10 ALIGN=MIDDLE  ALT=\"y=0.06x%2B10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
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