document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=715844>Question 715844</A>: <I><SPAN STYLE=\"word-break: break-all;\"> in 2005, the precent of U.S. drivers wearing seat belts was 82%.  The number of drivers wearing seat belts in 2000 was 71%.  Let y be the number of drivers wearing seat belts in the year x where x=0 represents the year 2000.<BR>\n" );
document.write( "a) Write a linear equation that models the percent of US. drivers wearing seat belts in terms of the year x.<BR>\n" );
document.write( "b) Use the equation found in part (a) to predict the number of U.S. drivers wearing seat belts in the year 2009. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #439623 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=439623\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> in 2005, the precent of U.S. drivers wearing seat belts was 82%. The number of drivers wearing seat belts in 2000 was 71%. Let y be the number of drivers wearing seat belts in the year x where x=0 represents the year 2000.<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "You have 2 points relating year and percent:<BR>\n" );
document.write( "(5,82) and (0,71)<BR>\n" );
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document.write( "a) Write a linear equation that models the percent of US. drivers wearing seat belts in terms of the year x.<BR>\n" );
document.write( "slope = (82-71)/(5-0) = 11/5 = 2.2<BR>\n" );
document.write( "----<BR>\n" );
document.write( "intercept = f(0) = 71<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "y = 2.2x + 71<BR>\n" );
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document.write( "\n" );
document.write( "b) Use the equation found in part (a) to predict the number of U.S. drivers wearing seat belts in the year 2009.<BR>\n" );
document.write( "----<BR>\n" );
document.write( "f(9) = 2.2*9+71 = 90.8%<BR>\n" );
document.write( "=============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=============================<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );