document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=872339>Question 872339</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 2001, U.S. per capita consumption of bottled water was 18.8 gallons, and in 2006, U.S. per capita consumption of bottled water was 28.3 gallons. Let y be the number of gallons of bottled water consumed per capita in the U.S. in the year x, where x = 0 represents the year 2001. \r<BR>\n" );
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document.write( "(a) Which of the following linear equations could be used to predict the number of gallons of bottled water consumed per capita in the U.S. in a given year x, where x = 0 represents the year 2001?  <BR>\n" );
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document.write( " A. y = 9.5x &#8722; 18,990.7 <BR>\n" );
document.write( " B. y = 9.5x + 18.8 <BR>\n" );
document.write( " C. y = 1.9x &#8722; 3783.1 <BR>\n" );
document.write( " D. y = 1.9x + 18.8 <BR>\n" );
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document.write( " (b) Use the equation from part (a) to estimate the number of gallons of bottled water consumed per capita in the U.S. in 2014.  <BR>\n" );
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document.write( "(c) Fill in the blanks to interpret the slope of the equation: The average rate of change of bottled water consumed per capita with respect to time is <BR>\n" );
document.write( " ______________________ per ______________. (Include units of measurement.) \r<BR>\n" );
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document.write( "Would you please show the solution? Thanks. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #526058 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=526058\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the y intercept is 18.8 <BR>\n" );
document.write( "when x=0 then y=18.8<BR>\n" );
document.write( "so it is either B or D<BR>\n" );
document.write( "the slope is (8.3-18.8)/5=1.9<BR>\n" );
document.write( "so it is D)\r<BR>\n" );
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document.write( "the slope is the change in consumption per year<BR>\n" );
document.write( "Each year it went up 1.9 gallons per person<BR>\n" );
document.write( "y = 1.9x + 18.8 <BR>\n" );
document.write( "43.5 = 1.9(13) + 18.8 <BR>\n" );
document.write( "43.5 gallons in 2014 </SPAN>\n" );
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