document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=326064>Question 326064</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How would I write the linear cost function.\r<BR>\n" );
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document.write( "12 units cost $445; 50 units cost $1585.\r<BR>\n" );
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document.write( "I know the answer is c(x)=3x+85\r<BR>\n" );
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document.write( "But I can't figure out how they go the 3 or the 85. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #233388 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=233388\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I don't know either since neither point works in the equation,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=c%2812%29=3%2812%29%2B85 ALIGN=MIDDLE  ALT=\"c%2812%29=3%2812%29%2B85\"   DISABLED_style= \"max-width:90%; height:auto;\" >=$121<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=c%2850%29=3%2850%29%2B85 ALIGN=MIDDLE  ALT=\"c%2850%29=3%2850%29%2B85\"   DISABLED_style= \"max-width:90%; height:auto;\" >=$235<BR>\n" );
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document.write( "The linear function would look like, <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;\" ><BR>\n" );
document.write( "With the first point,<BR>\n" );
document.write( "1.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12m%2Bb=445 ALIGN=MIDDLE  ALT=\"12m%2Bb=445\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "With the second point,<BR>\n" );
document.write( "2.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=50m%2Bb=1585 ALIGN=MIDDLE  ALT=\"50m%2Bb=1585\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Subtract eq. 1 from eq. 2 to eliminate b.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=50m%2Bb-12m-b=1585-445 ALIGN=MIDDLE  ALT=\"50m%2Bb-12m-b=1585-445\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=38m=+1140 ALIGN=MIDDLE  ALT=\"38m=+1140\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m=1140%2F38=30 ALIGN=MIDDLE  ALT=\"m=1140%2F38=30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Did you mean 30 instead of 3 in your solution above?<BR>\n" );
document.write( "Then use either equation to solve for b.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12%2830%29%2Bb=445 ALIGN=MIDDLE  ALT=\"12%2830%29%2Bb=445\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=360%2Bb=445 ALIGN=MIDDLE  ALT=\"360%2Bb=445\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b=85 ALIGN=MIDDLE  ALT=\"b=85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%28x%29=30x%2B85 ALIGN=MIDDLE  ALT=\"C%28x%29=30x%2B85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Just to verify,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%2812%29=30%2812%29%2B85 ALIGN=MIDDLE  ALT=\"C%2812%29=30%2812%29%2B85\"   DISABLED_style= \"max-width:90%; height:auto;\" >=$445<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%2850%29=30%2850%29%2B85 ALIGN=MIDDLE  ALT=\"C%2850%29=30%2850%29%2B85\"   DISABLED_style= \"max-width:90%; height:auto;\" >=$1585<BR>\n" );
document.write( " </SPAN>\n" );
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