Question

What are the three major temperature scales and how are they related to one another?

Answer 1

You have:
1] The Celsius Scale, indicated by `°C`;
2] Fahrenheit Scale, indicated by `°F`;
3] Kelvin Scale indicade by `K` (without `°`).

You can relate them as:
`T_F=9/5T-C+32°`
`T_C=5/9(T_F-32°)`
`T_K=T_C+273`