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The wind-chill index W is then perceived temperature when the actual temperature

ID: 2858053 • Letter: T

Question

The wind-chill index W is then perceived temperature when the actual temperature is r and the wind speed is v, so we can write W = f(T, V). Estimate the values of f_T (-15, 50) and f(-15, 50). What are the practical interpretations of these values? When the actual temperature is -15 degree C and the wind speed is 50 km/h, the apparent temperature by about degree C for every degree that the actual temperature rises. When the actual temperature is -15 degree C and the wind speed is 50 km/h, the apparent temperature by about degree C for every km/h that the wind speed increases.

Explanation / Answer

find slopes ,

fT(-15,50) = f(-10,50)-f(-15,50)/5 = -22-(-29) /5 = 7/5 = 1.4

fv(-15,50) = f(-15,60)-f(-15,50)/10 = -30 -(-29)/10 = -1/10 = -0.1

understanding ,

a) apperent temp incereases by 1.4 for every degree that rises

c) apperent temp decreases by 0.1 for every km/hr wind increases