document.write( "Question 48276: Jenny exercises on a treadmill. After 2 minutes, her heart rate is 82, after 3 minutes it is 86. Assume a linear relationship between time and heart rate. Predict the heart rate after 10 minutes. \n" ); document.write( "

Algebra.Com's Answer #31940 by Nate(3500) $\"\"$ $\"About$

You can put this solution on YOUR website!
P(2,82) and P(3,86)
\n" ); document.write( "M = (y2 - y1)/(x2 - x1) = (86 - 82)/(3 - 2) = 4/1
\n" ); document.write( "point-slope form:
\n" ); document.write( " $\"y+-+y1+=+M%28x+-+x1%29\"$
\n" ); document.write( " $\"y+-+82+=+4%28x+-+2%29\"$
\n" ); document.write( " $\"y+-+82+=+4x+-+8\"$
\n" ); document.write( " $\"y+=+4x+%2B+74\"$
\n" ); document.write( "After 10 minutes:
\n" ); document.write( " $\"y+=+40+%2B+74+=+114\"$ \n" ); document.write( "

\n" );