Sales Forecast Modeling. The change in the quantity of product C demanded in any

Question

Sales Forecast Modeling. The change in the quantity of product C demanded in any given week is inversely proportional to the change in sales of product D in the previous week. That is, if sales of D rose by X percent last week, sales of C can be expected to fall by X percent this week.



Write the equation for next week's sales of C, using the symbols C = sales of product C, D = sales of product D, and t = time. Assume there will be no shortages of either product.

Last week 750 units of C and 600 units of D were sold. Two weeks ago, 500 units of product D were sold. What would you predict the sales of C to be this week?

Explanation / Answer

A. (A/B) x t B. (200 of B/500 of A) x 250 of B.

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