document.write( "Question 444835: Can someone please help me with the problem below? I posted this last night but I had left out part of the equation. I need help desperately I am no good at doing graphs. If possible can you show me how you worked it? Thank you all so much for what you do.\r
\n" ); document.write( "\n" ); document.write( "Maximum Heart Rate When exercising, people
\n" ); document.write( "often try to maintain target heart rates that are a percentage
\n" ); document.write( "of their maximum heart rate. Maximum heart
\n" ); document.write( "rate R is R=220- A, where A is the person’s age
\n" ); document.write( "and R is the heart rate in beats per minute.
\n" ); document.write( "(a) Find R for a person 20 years old and 70 years old.
\n" ); document.write( "(b) Sketch a graph of Assume that A
\n" ); document.write( "is between 20 and 70 and put A on the horizontal
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\n" ); document.write( "(c) Interpret your graph.
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Algebra.Com's Answer #306566 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi
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document.write( "Maximum heart rate R is R=220- A, where A is the person’s age
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document.write( "and R is the heart rate in beats per minute.
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document.write( "R(20) = 220-20 = 200
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document.write( "R(70) = 220-70 = 150
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document.write( " Ordered pairs 
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document.write( "(70,150) and 
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document.write( "(20,200)   m = -50/50 = -1   |Using the point-slope formula, 
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document.write( "Using the standard slope-intercept form for an equation of a line y = mx + b 
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document.write( " where m is the slope and b the y-intercept.  
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document.write( "  As stated: R = -A + 220
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document.write( "Plot (70,150) and (20,200)and connect with line.
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document.write( "Graph says as age increases, that Maximum heart rate number decreases
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