Which formula converts Celsius to Fahrenheit?

Which formula converts Celsius to Fahrenheit?

• A. F = 5/9 x C + 32
• B. F = 9/5 x C - 32
• C. F = 9/5 x C + 32
• D. F = 2 x C + 32

Answer: (C)

Converting Celsius to Fahrenheit uses a scale factor and an offset. From 0 C, water freezes at 32 F, and a one-degree change in Celsius corresponds to a 9/5 degree change in Fahrenheit. Put together, that gives F = (9/5)C + 32. This aligns with the known reference points, like 0 C equals 32 F and 100 C equals 212 F, which determine the slope as 180/100 = 9/5. The other forms don’t fit those relationships: F = (9/5)C - 32 would make 0 C equal -32 F; F = (5/9)C + 32 uses the inverse slope and would yield much smaller Fahrenheit values for typical Celsius temps; F = 2C + 32 uses a steeper slope than correct, giving 100 C as 232 F.

Converting Celsius to Fahrenheit uses a scale factor and an offset. From 0 C, water freezes at 32 F, and a one-degree change in Celsius corresponds to a 9/5 degree change in Fahrenheit. Put together, that gives F = (9/5)C + 32. This aligns with the known reference points, like 0 C equals 32 F and 100 C equals 212 F, which determine the slope as 180/100 = 9/5. The other forms don’t fit those relationships: F = (9/5)C - 32 would make 0 C equal -32 F; F = (5/9)C + 32 uses the inverse slope and would yield much smaller Fahrenheit values for typical Celsius temps; F = 2C + 32 uses a steeper slope than correct, giving 100 C as 232 F.