document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=39729>Question 39729</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the equation if  <BR>\n" );
document.write( "X  Y                     <BR>\n" );
document.write( "0  9.5<BR>\n" );
document.write( "1  9<BR>\n" );
document.write( "2  8.5<BR>\n" );
document.write( "3  8 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #25146 by </B><A HREF=/tutors/aboutme.mpl?userid=smik><B>smik(40)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=smik><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=25146\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Good question. Since the rate of change is constant - it's constantly changing by (-0.5) - we know it's a linear equation. Linear Equations are written in the form: y = mx + b, where m is the slope, and b is the y-intercept. We already know the slope: -0.5. We also know the y-intercept from the data above because x = 0 when y = 9.5. Now we know the whole equation:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-0.5x%2B9.5 ALIGN=MIDDLE  ALT=\"y=-0.5x%2B9.5\"   DISABLED_style= \"max-width:90%; height:auto;\" >  </SPAN>\n" );
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