The following data represent the wind speed (mph) and wind chill factor at an air temperature of 15°F.

(a) Using a graphing utility, draw a scatter diagram with wind speed as the independent variable.

(b) Using a graphing utility, build a logarithmic model from the data.

(c) Using a graphing utility, draw the logarithmic function found in part (b) on the scatter diagram.

(d) Use the function found in part (b) to predict the wind chill factor if the air temperature is 15°F and the wind speed is 23 mph.

Wind Speed (mph) ………………………… Wind Chill Factor (°F)

5 ………………………………………………………..…. 7

10 ……………………………………………………….…. 3

15 ……………………………………………………….…. 0

20 …………………………………………………………. -2

25 …………………………………………………………. -4

30 …………………………………………………………. -5

35 …………………………………………………………. -7