SOLUTION: 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

Algebra ->  Linear-equations -> SOLUTION: 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      Log On


   

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.
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
P(2,82) and P(3,86)
M = (y2 - y1)/(x2 - x1) = (86 - 82)/(3 - 2) = 4/1
point-slope form:
y+-+y1+=+M%28x+-+x1%29
y+-+82+=+4%28x+-+2%29
y+-+82+=+4x+-+8
y+=+4x+%2B+74
After 10 minutes:
y+=+40+%2B+74+=+114