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Cost function (1 Viewer)

Hivaclibtibcharkwa

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So this question is based of this theory. Now the problem is that the marginal cost in the theory is a part of the total cost. However in this question 8, they say it costs ANOTHER $7 for each additional ball. So I’m assuming for anymore balls than the original 1000 you pay $7 for each. Rather than 31000/1000 = $31 for the first 1000.
How would I write this a function, am I missing something?

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cossine

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So you need to figure out b.

31000/1000 = $31? The average cost is not the marginal cost because the fixed cost is included. Hence you cannot use the average price as the marginal cost.

So what you have is 7*(1000)+b = 31000
 

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