The wind-chill index is modeled by the function W − 13.12 1 0.6215T 2 11.37v 0.16 1 0.3965Tv 0.16 where T is the temperature (in °C) and v is the wind speed (in kmyhd. When T − 215 °C and v − 30 kmyh, by how much would you expect the apparent temperature W to drop if the actual temperature decreases by 1°C? What if the wind speed increases by 1 kmyh?

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Domain

In simple mathematics terms, a domain is defined as the space on which all the possible inputs for the function will lie. It can also be expressed as a set of departures for the required function.