A Year-Long Fitness Center Study Sought to Determine If There

question 26

Multiple Choice

A year-long fitness center study sought to determine if there is a relationship between the amount of muscle mass gained y (kilograms) and the weekly time spent working out under the guidance of a trainer x (minutes.) The resulting least-squares regression line for the study is y = 2.04 + 0.12x.
We can see from the equation of the line that, as the weekly time spent working out x goes up,

• A) muscle mass gained y tends to go up because the slope 2.04 is positive.
• B) muscle mass gained y tends to go up because the slope 0.12 is positive.
• C) muscle mass gained y tends to go down because the slope 0.12 is less than 2.04.
• D) muscle mass gained y tends to go down, because the slope 0.12 is less than 52.

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Definitions:

MRP

Material Requirements Planning (MRP) is a system for planning production, scheduling activities, and controlling inventory used in overseeing manufacturing operations.

MPP

Marginal Physical Product, the additional output resulting from the use of one more unit of a variable input, holding all other inputs constant.

MRP

Marginal Revenue Product; the additional revenue generated from employing one more unit of a resource or factor of production.

Substitution Effect

The change in demand for a good or service that occurs when its price increases or decreases, leading consumers to substitute it with other goods or services that are relatively more or less expensive.