document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1178384>Question 1178384</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the total cost to produce 10 units of a certain product is $40,and for 20 units the cost is $70.the total cost is linearly related to number of units produces. find the total cost of producing 25 units. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #850335 by </B><A HREF=/tutors/aboutme.mpl?userid=timofer><B>timofer(105)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=timofer><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=850335\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This seems to be like  you have points on a line  (10,40), (20,70), and (25,c).\r<BR>\n" );
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document.write( "slope <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%287-4%29%2F%282-1%29=3 ALIGN=MIDDLE  ALT=\"%287-4%29%2F%282-1%29=3\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "If trying point-slope equation, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-40=3%28x-10%29 ALIGN=MIDDLE  ALT=\"y-40=3%28x-10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=3x-30%2B40 ALIGN=MIDDLE  ALT=\"y=3x-30%2B40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=3x%2B10 ALIGN=MIDDLE  ALT=\"y=3x%2B10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "but you want c=y, and x=25.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=c=3%2A25%2B10 ALIGN=MIDDLE  ALT=\"c=3%2A25%2B10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28highlight%28c=85%29%29 ALIGN=MIDDLE  ALT=\"highlight%28highlight%28c=85%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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