document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=28989>Question 28989</A>: <I><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "On the basis of current legislation, if you earned an average salary of $25,000 over your working life and you retire after the year 2005 at age 62,63, or 64, then your annual Social Security Benefit will be $7000, $7500, or $8000, respectively (Social Security Administration, www.ssa.gov). Write a formula that gives annual benefit as a linear function of age of these three ages. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15830 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=15830\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You have three pairs of numbers.  You only need two to<BR>\n" );
document.write( "determine a linear equation.<BR>\n" );
document.write( "Points are (62,7000), (63,7500), (64,8000)<BR>\n" );
document.write( "Using the 1st two you have a slope of [500/1]<BR>\n" );
document.write( "Using x=63, y=7000, m=500 use y=mx+b to find \"b\".<BR>\n" );
document.write( "7000=500(63)+b<BR>\n" );
document.write( "7000=31500+b<BR>\n" );
document.write( "b=-24500<BR>\n" );
document.write( "Your equation is y=500x-24500<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );