Example

Solving an Inverse Variation Application: Product Demand and Price

Apply the problem-solving strategy for inverse variation to calculate product demand based on price. The problem states that the daily demand for a product, dd, is inversely proportional to its price, pp. Thus, the general formula is d=kpd = \frac{k}{p}. Given that when the price is $55, the demand is 700700 units, substitute these values to determine the constant of variation: 700=k5700 = \frac{k}{5}, yielding k=3500k = 3500. The specific equation relating demand and price is d=3500pd = \frac{3500}{p}. To find the demand if the price is raised to $77, substitute p=7p = 7 into the equation: d=35007d = \frac{3500}{7}, which simplifies to d=500d = 500. The demand would be 500500 units if the price is raised to $77.

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Updated 2026-05-01

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