The learning-curve models presented in the text examine . A. the change in variable costs when quantity discounts are available B. how setup costs decline as more workers are added C. how efficiency increases as more units are produced D. how quality increases over time

 D. how quality increases over time (happy to help)

Step-by-step explanation:

step-by-step explanation:

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answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

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