Which of the following formulas is used to convert Celsius to Fahrenheit?

The formula used to convert Celsius to Fahrenheit is (C * 9/5) + 32. This formula works by first taking the Celsius temperature and multiplying it by the fraction 9/5, which accounts for the difference in the size of the degree between the two temperature scales. After this multiplication, 32 is added to adjust for the zero point difference; in the Fahrenheit scale, 32 degrees is the equivalent of 0 degrees in the Celsius scale.

Understanding this formula is useful because it allows for quick conversions between these two commonly used temperature scales.