A Cold Wind Blowing

Brrr... it's cold and windy outside. How much colder is it when the wind is blowing?

Go to the Windchill Factor calculator and find out what it is for various temperatures.


http://www.coolmath.com/calculators/windchill.htm

Use this one if the coolmath one doesn't work.
http://www.srh.noaa.gov/elp/wxcalc/windchill.html?

Fill in this chart:
Air temperature
Wind Speed
Wind Chill temperature
30
5

30
25

30
45

30
65

30
85


Can you determine a formula that would tell you what the wind chill temperature will be for varying wind speeds when the air temperature is 30?