According to the reference, how do you convert Celsius to Fahrenheit?

• A. F = Temp x 1.8 + 32
• B. F = Temp x 2 + 32
• C. F = Temp + 32
• D. F = Temp x 1.0 + 32

Answer: (A)

Converting Celsius to Fahrenheit uses a scaling of 9/5 (1.8) and a shift of 32. Multiply the Celsius temperature by 1.8, then add 32 to get Fahrenheit. This matches the relationship between the two scales, where 0°C is 32°F and 100°C is 212°F. So F = Temp × 1.8 + 32 is the correct form. Using a multiplier of 2 or 1.0 changes the scale and leads to incorrect results (for example, 0°C would still be 32°F, but 100°C would become 232°F with a multiplier of 2, or 132°F with a multiplier of 1.0).