What formula is correctly used for converting a patient's weight from kilograms to pounds?

To convert a patient's weight from kilograms to pounds, the correct formula involves multiplying the number of kilograms by a specific conversion factor. The conversion factor for kilograms to pounds is approximately 2.2. Therefore, when you multiply the weight in kilograms by 2.2, you obtain the equivalent weight in pounds. This method is based on the fact that one kilogram is approximately equal to 2.2 pounds.

The other choices present incorrect methods for conversion. Dividing the number of kilograms by 2.2 would yield a smaller number, which does not accurately reflect the conversion to pounds. Simply adding 2.2 to the number of kilograms does not adhere to any conversion principle and results in an incorrect interpretation of the weight. Lastly, multiplying the number of pounds by 2.2 suggests that you would get kilograms as a result, which is also incorrect in the context of converting from kilograms to pounds.