Question
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  1. Let be the daily cost (in dollars) to heat an office building when the outside temperature is degre
    Fahrenheit.
    a. What is the meaning of ? What are the units?
    b. Would you expect to be positive or negative? Explain

Ask by Lowe Romero. in the United States
Jan 26,2025

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Answer

a. represents the rate at which the daily heating cost changes with temperature at 58°F, measured in dollars per degree Fahrenheit ($⁄°F).
b. is expected to be negative because higher outside temperatures generally lead to lower heating costs.

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Bonus Knowledge

represents the rate of change of the daily heating cost with respect to temperature when the outside temperature is 58 degrees Fahrenheit. In practical terms, it indicates how much the heating cost will increase or decrease for a small change in temperature around 58°F. The units for would be dollars per degree Fahrenheit ($ / °F).
You’d likely expect to be negative. This is because, generally, as the outside temperature rises (moves above 58°F), the cost to heat the building would decrease since the building would need less heating. Conversely, if the temperature drops below 58°F, the cost would likely increase, reflecting a common trend where heating costs are inversely related to outside temperatures.

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