SOLUTION: We want to set up a business so that the minimum cost occurs when we make 13,000 items per hour at a cost of $21 per item. We also know that if we make 9,000 items per hour the cos

Question 366578: We want to set up a business so that the minimum cost occurs when we make 13,000 items per hour at a cost of $21 per item. We also know that if we make 9,000 items per hour the cost per item is $24.
Create a quadratic equation that represents the situation. Give you final answer in the form y=ax^2+bx+c
I cannot figure out how to write anything in this form. I don't understand which each letter stands for.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Hint: The quadratic in the form gives you the vertex (h,k). At this vertex is the highest/lowest point. Since we want to minimize costs, this means that (h,k) is the lower point. Also, this means that (ie 'a' is negative). Let me know if this is enough to get started.
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