document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=909698>Question 909698</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose the weights (W) of male student in MA102 are linearly related to their heights (h). If a student 150 cm tall weights 70kg, and a student 165 cm tall weights 110kg. a) write an equation to express weight in terms of height. B) If there is a student with 90kg weight, how tall is this student? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #552001 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=552001\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I will plot height (h) on the horizontal axis and<BR>\n" );
document.write( "I will plot weight (W) on the vertical axis<BR>\n" );
document.write( "-----------------------------------<BR>\n" );
document.write( "You are given 2 points:<BR>\n" );
document.write( "( 150, 70 ) and<BR>\n" );
document.write( "( 165, 110 )<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "(a)<BR>\n" );
document.write( "You can use the general point-slope formula:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+W+-+70+%29+%2F+%28+h+-+150+%29+=+%28+110+-+70+%29+%2F+%28+165+-+150+%29+ ALIGN=MIDDLE  ALT=\"+%28+W+-+70+%29+%2F+%28+h+-+150+%29+=+%28+110+-+70+%29+%2F+%28+165+-+150+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+W+-+70+%29+%2F+%28+h+-+150+%29+=+40+%2F+15+ ALIGN=MIDDLE  ALT=\"+%28+W+-+70+%29+%2F+%28+h+-+150+%29+=+40+%2F+15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+W+-+70+%29+%2F+%28+h+-+150+%29+=+8+%2F+3+ ALIGN=MIDDLE  ALT=\"+%28+W+-+70+%29+%2F+%28+h+-+150+%29+=+8+%2F+3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+h+-+150+%29%2A3+ ALIGN=MIDDLE  ALT=\"+%28+h+-+150+%29%2A3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3%2A%28+W+-+70+%29+=+8%2A%28+h+-+150+%29+ ALIGN=MIDDLE  ALT=\"+3%2A%28+W+-+70+%29+=+8%2A%28+h+-+150+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3W+-+210+=+8h+-+1200+ ALIGN=MIDDLE  ALT=\"+3W+-+210+=+8h+-+1200+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3W+=+8h+-+990+ ALIGN=MIDDLE  ALT=\"+3W+=+8h+-+990+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W+=+%288%2F3%29%2Ah+-+330+ ALIGN=MIDDLE  ALT=\"+W+=+%288%2F3%29%2Ah+-+330+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "check the answer:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W+=+70+ ALIGN=MIDDLE  ALT=\"+W+=+70+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+70+=+%288%2F3%29%2Ah+-+330+ ALIGN=MIDDLE  ALT=\"+70+=+%288%2F3%29%2Ah+-+330+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%288%2F3%29%2Ah+=+400+ ALIGN=MIDDLE  ALT=\"+%288%2F3%29%2Ah+=+400+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8h+=+1200+ ALIGN=MIDDLE  ALT=\"+8h+=+1200+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+h+=+150+ ALIGN=MIDDLE  ALT=\"+h+=+150+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "(b)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W+=+90+ ALIGN=MIDDLE  ALT=\"+W+=+90+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+90+=+%288%2F3%29%2Ah+-+330+ ALIGN=MIDDLE  ALT=\"+90+=+%288%2F3%29%2Ah+-+330+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%288%2F3%29%2Ah+=+420+ ALIGN=MIDDLE  ALT=\"+%288%2F3%29%2Ah+=+420+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8h+=+1260+ ALIGN=MIDDLE  ALT=\"+8h+=+1260+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+h+=+157.5+ ALIGN=MIDDLE  ALT=\"+h+=+157.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The student weighs 157.5 kg\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );