Given below is the scatter plot of the price/earnings ratio versus earnings per
share of 20 U.S. companies. There appear to be a positive relationship between price/earnings
ratio and earnings per share. 
Definitions:
Conduction Cells
Specialized cells that transmit electrical impulses within the heart, facilitating coordinated heartbeats.
Aortic Semilunar Valve
The valve that regulates blood flow from the heart into the aorta, preventing backflow into the ventricle.
Lubb (S1)
The sound made by the closure of the mitral and tricuspid valves at the beginning of systole, commonly referred to as the "first heart sound."
Dupp (S2)
The sound made by the heart's valves closing in the cardiac cycle, often associated with the splitting or duplication of the second heart sound.
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