document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=312064>Question 312064</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4.  The data below are the ages and systolic blood pressure (measured in millimeters of mercury) of 9 randomly selected adults.<BR>\n" );
document.write( "Age, x	38	41	45	48	51	53	57	61	65<BR>\n" );
document.write( "Pressure, y	116	120	123	131	142	145	148	150	152\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "a. Find the equation of the regression line for the given data. Round the line values to the nearest two decimal places.  (2.5 points)  Show your work.<BR>\n" );
document.write( "		\r<BR>\n" );
document.write( "\n" );
document.write( "b. Using the equation found in part a, predict the pressure when the age is 50. Round to the nearest mm. (2.5 points)\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #223122 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=223122\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a) Xave=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=51 ALIGN=MIDDLE  ALT=\"51\"   DISABLED_style= \"max-width:90%; height:auto;\" >, Yave=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=136.33 ALIGN=MIDDLE  ALT=\"136.33\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Sum of squares x terms (SSXX)=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=650 ALIGN=MIDDLE  ALT=\"650\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Sum of squares y terms (SSYY)=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1562 ALIGN=MIDDLE  ALT=\"1562\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Sum of squares xy terms (SSXY)=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=967 ALIGN=MIDDLE  ALT=\"967\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "b=SSXY/SSXX=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1.4877 ALIGN=MIDDLE  ALT=\"1.4877\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "b'=SSXY/SSYY=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.6191 ALIGN=MIDDLE  ALT=\"0.6191\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "r^2=b*b'=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.920 ALIGN=MIDDLE  ALT=\"0.920\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "a=Yave-b(Xave)=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=60.46 ALIGN=MIDDLE  ALT=\"60.46\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28y=1.49x%2B40.46%29 ALIGN=MIDDLE  ALT=\"highlight_green%28y=1.49x%2B40.46%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "b) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=1.49x%2B40.46 ALIGN=MIDDLE  ALT=\"y=1.49x%2B40.46\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=1.49%2850%29%2B60.46 ALIGN=MIDDLE  ALT=\"y=1.49%2850%29%2B60.46\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=1.49%2850%29%2B60.46 ALIGN=MIDDLE  ALT=\"y=1.49%2850%29%2B60.46\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=74.385%2B60.46 ALIGN=MIDDLE  ALT=\"y=74.385%2B60.46\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=134.85 ALIGN=MIDDLE  ALT=\"y=134.85\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "135 mm<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );