WEST–B Mathematics Practice Test

The formula for converting Celsius to Fahrenheit is derived from the relationship between the two temperature scales. To convert a temperature from Celsius (C) to Fahrenheit (F), the correct formula is F = (C × 9/5) + 32.

This formula consists of two parts: the multiplication by 9/5 (or 1.8), which adjusts the scale of Celsius to Fahrenheit, because Fahrenheit degrees are larger than Celsius degrees; and the addition of 32, which accounts for the point where the two scales intersect. Specifically, 32°F is the freezing point of water, while 0°C is the same point in the Celsius scale. Therefore, using this formula enables accurate conversion by recognizing both the scaling of temperature and the offset between the two scales.

The inclusion of 9/5 reflects how many Fahrenheit degrees correspond to one Celsius degree in temperature change, while adding 32 shifts the entire temperature range accordingly. This accurate relationship is crucial for conversions between these commonly used temperature measurements.