Determine which of the following variables "changes" or "remains fixed" as we move along the demand curve for pencils. the quantity of pencils demanded ▼ changes remains fixed as we move along the demand curve for pencils. the number of consumers ▼ changes remains fixed as we move along the demand curve for pencils. the price of pencils ▼ changes remains fixed as we move along the demand curve for pencils. the price of pens ▼ changes remains fixed as we move along the demand curve for pencils. consumer income ▼ changes remains fixed as we move along the demand curve for pencils.

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a manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. at the end of december, the company wishes to forecast sales for january. the estimate of trend through november has been 200 additional boards sold per month. average sales have been around 1000 units per month. the demand for december was 1100 units. the company uses α = 0.20 and β = 0.10. make a forecast including trend for the month of january.

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