A Zumba instructor remembers the data given in the following table, which shows the recommended maximum exercise heart rates for individuals of the given Age ( x years) 20 40 60 Maximum heart rate 170...

1. A Zumba instructor remembers the data given in the following table, which shows the recommended maximum exercise heart rates for individuals of the given

Age (x
years)
20      40      60

Maximum heart rate
170    153   136

(y
beats per minute)

1. Find the linear correlation coefficient for the


2. What is the significance of the value found in part a?


3. Find the equation of the least-squares


4. Use the equation from part c to predict the maximum exercise heart rate for a person who is


5. Is the procedure in part d an example of interpolation or extrapolation?