Question

michael swam 2,000 yards on each of eighteen days. the scatter - plot above shows his swim time for and corresponding heart rate after each swim. the line of best fit for the data is also shown. for the swim that took 34 minutes, michaels actual heart rate was about how many beats per minutes less than the rate predicted by the line of best fit? a) 1 b) 2 c) 3 d) 4

Explanation:

Step1: Locate 34 minutes on x - axis

Find the point on the scatter - plot where the swimming time is 34 minutes.

Step2: Determine actual heart rate

The actual heart rate at 34 minutes is the y - value of the data point at x = 34. It is approximately 148 beats per minute.

Step3: Determine predicted heart rate

The predicted heart rate at 34 minutes is the y - value of the line of best fit at x = 34. It is approximately 150 beats per minute.

Step4: Calculate the difference

Subtract the actual heart rate from the predicted heart rate: 150 - 148=2.

Answer:

B. 2