Measuring a person\'s strength – One way to measure a strength is via the bench

Question

Measuring a person's strength – One way to measure a strength is via the bench press, maximum weight a person can bench press.
This unfortunately is a risky measurement for an individual that is not familiar with proper lifting techniques or just the strain of finding the maximum load. A study of 57 females athletes to see if repetitions at a low weight can be correlated to strength measured by the maximum amount the female athlete can lift. Below is the resulting scatterplot, and summary information. The variable x represents the number of 60 lb repetitions that a female athlete bench pressed, and y represents the maximum weight that she bench pressed.

THE ANSWER IS NOT 15 and 20!!!!!
MB (IN) 12148x+98.584 R:#0473 150 E 140 130 120 110 100 90 E 80 0 5 10 15 20 25 30 35 40 Number of Repetitions

Explanation / Answer

here as we can see that data range for repetions is from ~ 3 to ~35

theefore 40 and 50 reps are outside of data range and therefore can cause extrapolation

theefore correct answer is 40 ; 50

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