
Posted by unklemyke  10/11/10 
Well, actually, you subtract because Celsius sets the freezing point of water as 0ΒΊ and Fahrenheit sets it at 32ΒΊ. likewise, the boiling point of water is 100ΒΊ C, 212ΒΊ F. :)
The 180 point difference in F as opposed to the 100 point difference in C yeilds the constant  and it's 5/9 from F to C, not 1/9. Conversely, you multiply by 9/5 going form C to F. :roll: 

Posted by Nerine  01/06/11 
Huh, it's quite obvious when you knoew the answer :D 

Posted by AndrewWalker  01/31/12 
I didn't get the exact answer, but I do know, if you graph the resulting conversions as linear functions, each line has a unique slope. This means there is a nonlinear relationship between the two conversions. Also the two lines intersect at the point (40,40) so 40 degrees F= 40 degrees C 

Posted by eighsse  07/28/13 
If you have a decent understanding of the temperature scales, this isn't much of a teaser, just asking an everyday question. But hey, not everyone does have a good understanding of it, so I'm sure some people learned something here :) 