What equation is used to convert Celsius to Fahrenheit?

The equation used to convert Celsius to Fahrenheit is (C x 9/5) + 32. This formula works by first taking the Celsius temperature (C) and multiplying it by 9/5, which scales the temperature according to the different increments between the two scales. The result from that multiplication is then added to 32. The addition of 32 is crucial because it adjusts the starting points of the two temperature scales; 0 degrees Celsius, which corresponds to 32 degrees Fahrenheit.

The incorrect options all represent different transformations or conversions. For instance, (C - 32) x 5/9 is actually the formula to convert Fahrenheit to Celsius, not the other way around. Meanwhile, (F - 32) / 9/5 also serves to convert from Fahrenheit to Celsius. Lastly, simply adding 32 to Celsius does not translate the temperature adequately, as it neglects the necessary scaling factor of 9/5 that differentiates the scales. Thus, the correct choice effectively captures the proper conversion process.