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Math Help - Changing Farenhiet into a celsius

  1. #1
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    Changing Farenhiet into a celsius

    I'm not understanding the whole degrees celsius= 5/9 ( degrees celsius - 32).

    Is there any other way that this can be explained? A more simpler way?

    Say I need to change 77 degress farenhiet. How would I go about changing that to degrees celsius?
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by ladyk View Post
    I'm not understanding the whole degrees celsius= 5/9 ( degrees celsius - 32).

    Is there any other way that this can be explained? A more simpler way?

    Say I need to change 77 degress farenhiet. How would I go about changing that to degrees celsius?

    • Take the temperature in Fahrenheit subtract 32.
    • Divide by 1.8.
    • The result is degrees Celsius.
    Last edited by masters; August 20th 2008 at 08:45 AM.
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  3. #3
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    Establish the Facts.

    Celsius

    Freezing = 0
    Boiling = 100

    Farenheit

    Freezing = 32
    Boiling = 212

    Establish the Model. I believe it to be linear

    C = B*(F - A)

    Apply the Facts

    0C = B*(32F - A)
    100C = B*(212F - A)

    Solve for the Model Parameters

    I will leave this to the interested student. That would be you.

    Hint: From the first equation, the value of A should be relatively obvious.

    Check with Other Known Values

    It is widely known that -40C = -40F and not quite so widely known that 40C = 104F. Make sure your values work for these two.

    Exploration: Once you get A and B, solve the Model Equation for F and create the formula for conversion in the other direction. It will be fun!
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  4. #4
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    Thanks to both of you!
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