IMathAS-libretexts

A company discovers that to produce

\displaystyle {x}=

1000 new electronic parts, it will cost

\displaystyle {y}=

$78,200. To produce 670 new electronic parts, it will cost $54,770.

Compute the average rate of change of the cost and choose the most accurate statement from the following:

Cost is decreasing at a rate of $67 per item.
Cost is increasing at a rate of $71 per item.
Cost is decreasing at a rate of $73 per item.
Cost is increasing at a rate of $67 per item.
Cost is decreasing at a rate of $71 per item.
Cost is increasing at a rate of $73 per item.

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