document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=243219>Question 243219</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Good afternoon. Could you please help me solve this strange percentage equation question from my Algebra II  class? \r<BR>\n" );
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document.write( "Creating expressions and equations-\r<BR>\n" );
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document.write( "The cost in millions of dollars, to remove x% of pollution in a lake modeled by\r<BR>\n" );
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document.write( "a.  what is the cost to remove 75% of the pollution?  \r<BR>\n" );
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document.write( "There is a list of different percentages after this but if someone could just help me understand what exaclty I should be creating then I will gladly do this on my own. Would this be an expression since limited information was given?  I will be searching the answers until someone can help me. Thank you so much. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #178205 by </B><A HREF=/tutors/aboutme.mpl?userid=oberobic><B>oberobic(2304)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oberobic><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=178205\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You need to provide more information.  For example, what is the cost to remove 1% of the pollution?  Then simply multiply by 75 to get the cost to remove 75%.<BR>\n" );
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document.write( "Since you say you have a series of percentages, I assume you have costs associated with each of these.<BR>\n" );
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document.write( "Plot these values to see if a straight line will fit.<BR>\n" );
document.write( "If so, derive the equation of the line and plug in 75% to get the expected cost.<BR>\n" );
document.write( "Note that .75 is the slope of the line = m.<BR>\n" );
document.write( "y = mx + b,<BR>\n" );
document.write( "where y = total cost.<BR>\n" );
document.write( "b would be some constant that is present in all cases.<BR>\n" );
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document.write( "If there is a single curve, then you have have to create a quadratic equation to solve it.<BR>\n" );
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document.write( "But in any case, we need more info to be able to help more. </SPAN>\n" );
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