document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=819718>Question 819718</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A baby weighs 9 pounds at birth and 30 pounds at age 3. Write an equation that <BR>\n" );
document.write( "shows the linear relationship between the weight and age. How much the child <BR>\n" );
document.write( "will weigh at age 12?\r<BR>\n" );
document.write( "\n" );
document.write( "Can you make sure to explain the steps as well? I need this to study for my final on Wed. Thank you!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #493196 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=493196\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You have to decide which variable to<BR>\n" );
document.write( "plot on which axis.<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "The independent variable goes on the x-axis<BR>\n" );
document.write( "That would be the age.<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "The dependent variable, pounds,  goes on the y-axis <BR>\n" );
document.write( "because the pounds <depends> on the age.<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "Now you can say:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+f%28x%29+ ALIGN=MIDDLE  ALT=\"+y+=+f%28x%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and you can use the general<BR>\n" );
document.write( "point-slope formula to show the relation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+30+-+9+%29+%2F+%28+3+-+0+%29+=+%28+y+-+9+%29+%2F+%28+x+-+0+%29+ ALIGN=MIDDLE  ALT=\"+%28+30+-+9+%29+%2F+%28+3+-+0+%29+=+%28+y+-+9+%29+%2F+%28+x+-+0+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+21%2F3+=+%28+y-9+%29+%2F+x+ ALIGN=MIDDLE  ALT=\"+21%2F3+=+%28+y-9+%29+%2F+x+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+7x+=+y+-+9+ ALIGN=MIDDLE  ALT=\"+7x+=+y+-+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+7x+%2B+9+ ALIGN=MIDDLE  ALT=\"+y+=+7x+%2B+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "How much will the child weigh at age 12?<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+7%2A12+%2B+9+ ALIGN=MIDDLE  ALT=\"+y+=+7%2A12+%2B+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+84+%2B+9+ ALIGN=MIDDLE  ALT=\"+y+=+84+%2B+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+93+ ALIGN=MIDDLE  ALT=\"+y+=+93+\"   DISABLED_style= \"max-width:90%; height:auto;\" > pounds<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "check the equation:<BR>\n" );
document.write( "When child is born:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+7%2A0+%2B+9+ ALIGN=MIDDLE  ALT=\"+y+=+7%2A0+%2B+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+9+ ALIGN=MIDDLE  ALT=\"+y+=+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( "When child is 3:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+7%2A3+%2B+9+ ALIGN=MIDDLE  ALT=\"+y+=+7%2A3+%2B+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+21+%2B+9+ ALIGN=MIDDLE  ALT=\"+y+=+21+%2B+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+30+ ALIGN=MIDDLE  ALT=\"+y+=+30+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );