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Letx be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims. 3 7 15 37 72 4D 35 30 27 17 la uses (a) Make a scatter diagram of the dam and visualize the line you think best ts the dam. (b) Would you say the correlation is low, moderate, or strong? positive or negative? O low and negative 0 strong and positive O strong and negative 0 low and positive 0 moderate and negative O moderate and positive (c) Use a calculator to verify that Ex = 134, 2x2 = 6836, Ey = 149, Ely2 = 4743, and Exy = 3038. Compute r. (Round youranswerto four decimal places.) As x increases, does the value of 1' imply that y should tend to increase or decrease? Explain. 0 Given our value of r, y should tend co remain constant as x increases. O Given our value of r, y should tend to decrease as x increases. 0 Given our value of r, we cannot draw any conclusions for the behavior of y as x increases. O Given our value of r, y should tend to increase as x increases