Mathematics, 15.09.2019 22:10, jinxjungkook3

The cost of manufacturing a molded part is related to the quantity produced during a production run. when 100 parts are produced, the cost is $300. when 500 parts are produced, the cost is $3100. what is the average cost per part?
studying for a test. answer key says 7 and i can't figure out why.

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The cost of manufacturing a molded part is related to the quantity produced during a production run....