Continuous recording of heart rate can be used to obtain information about the level of exercise intensity or physical strain during sports participation, work, or other daily activities. The article "The Relationship Between Heart Rate and Oxygen Uptake During Non-Steady State Exercise" (Ergonomics, 2000: 1578-1592) reported on a study to investigate using heart rate response (x, as a percentage of the maximum rate) to predict oxygen uptake (y, as a percentage of maximum uptake) during exercise. The accompanying data was read from a graph in the article.

Use a statistical software package to perform a simple linear regression analysis, paying particular attention to the presence of any unusual or influential observations.

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HR 43.5 44.0 44.0 44.5 44.0 45.0 48.0 49.0 VO,22.0 21.0 22.0 21.5 25.5 24.5 30.0 28.0 HR 49.5 51.0 54.5 57.5 57.7 61.0 63.0 72.0 vo,132.0 29.0 38.5 30.5 57.0 40.0 58.0 72.0