document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=62300>Question 62300</A>: <I><SPAN STYLE=\"word-break: break-all;\"> ok, i have 2 find out the formula for this table and ive tried all that i can think of, here it is.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Age (yr)                20   30   40   50   60   70<BR>\n" );
document.write( "Pulse rate (beats/min)  175  166  157  148  139  130\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Write an equation in function notation for the relation. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #43041 by </B><A HREF=/tutors/aboutme.mpl?userid=funmath><B>funmath(2933)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=funmath><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=43041\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Age (yr)                20   30   40   50   60   70<BR>\n" );
document.write( "Pulse rate (beats/min)  175  166  157  148  139  130\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Write an equation in function notation for the relation.<BR>\n" );
document.write( "If you were to plot this relation letting x= age and y= pulse rate, you would find that if you connected the dots they make a perfect line.<BR>\n" );
document.write( "In order to write a linear function, you need a point and a slope.  We have plenty of points, let's find the slope using the slope formula: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28m=%28y2-y1%29%2F%28x2-x1%29%29 ALIGN=MIDDLE  ALT=\"highlight%28m=%28y2-y1%29%2F%28x2-x1%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, m=slope, (x1,y1) and (x2,y2) are points.<BR>\n" );
document.write( "Let (x1,y1)=(20,175) and (x2,y2)=(30,166)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m=%28166-175%29%2F%2830-20%29 ALIGN=MIDDLE  ALT=\"m=%28166-175%29%2F%2830-20%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m=-9%2F10 ALIGN=MIDDLE  ALT=\"m=-9%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m=-.9 ALIGN=MIDDLE  ALT=\"m=-.9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now that we have the slope and a point we can use the point slope formula.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28y-y1=m%28x-x1%29%29 ALIGN=MIDDLE  ALT=\"highlight%28y-y1=m%28x-x1%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "m=-.9 and (x1,y1)=(20,175)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-175=-.9%28x-20%29 ALIGN=MIDDLE  ALT=\"y-175=-.9%28x-20%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-175=-.9x%2B18 ALIGN=MIDDLE  ALT=\"y-175=-.9x%2B18\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-175%2B175=-.9x%2B18%2B175 ALIGN=MIDDLE  ALT=\"y-175%2B175=-.9x%2B18%2B175\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-.9x%2B193 ALIGN=MIDDLE  ALT=\"y=-.9x%2B193\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Remember, y=pulse rate and x=age, in function notation:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28f%28x%29=-.9x%2B193%29 ALIGN=MIDDLE  ALT=\"highlight%28f%28x%29=-.9x%2B193%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >  where pulse rate is a function of age.<BR>\n" );
document.write( "Happy Calculating!!! </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );