document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=444614>Question 444614</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone please help me with this problem? I have much difficulty graphing and I desperately need help. Thank you all so much. Here is the problem below and if possible I need to see how you worked it.\r<BR>\n" );
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document.write( "Maximum Heart Rate When exercising, people<BR>\n" );
document.write( "often try to maintain target heart rates that are a percentage<BR>\n" );
document.write( "of their maximum heart rate. Maximum heart<BR>\n" );
document.write( "rate R is R=220-  where A is the person’s age<BR>\n" );
document.write( "and R is the heart rate in beats per minute.<BR>\n" );
document.write( "(a) Find R for a person 20 years old and R for 70 years old.<BR>\n" );
document.write( "(b) Sketch a graph of Assume that A<BR>\n" );
document.write( "is between 20 and 70 and put A on the horizontal<BR>\n" );
document.write( "axis of your graph.<BR>\n" );
document.write( "(c) Interpret your graph.<BR>\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 #306438 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=306438\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Maximum Heart Rate When exercising, people<BR>\n" );
document.write( "often try to maintain target heart rates that are a percentage<BR>\n" );
document.write( "of their maximum heart rate. Maximum heart<BR>\n" );
document.write( "rate R is R=220-A  where A is the person’s age<BR>\n" );
document.write( "and R is the heart rate in beats per minute.<BR>\n" );
document.write( "------------------------<BR>\n" );
document.write( "(a) Find R for a person 20 years old and R for 70 years old.<BR>\n" );
document.write( "R(20) = 220-20 = 200<BR>\n" );
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document.write( "(b) Sketch a graph of Assume that A<BR>\n" );
document.write( "is between 20 and 70 and put A on the horizontal<BR>\n" );
document.write( "axis of your graph.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C300%2C20%2C70%2C-10%2C230%2C220-x%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C300%2C20%2C70%2C-10%2C230%2C220-x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "(c) Interpret your graph.<BR>\n" );
document.write( "I'll leave that to you.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );