If a coding professional completes 23 charts during a 7.5-hour day, what is his coding rate per hour when rounded?

To find the coding rate per hour, you need to divide the total number of charts completed by the total number of hours worked. In this instance, the coding professional has completed 23 charts over a period of 7.5 hours.

When you perform the calculation:

[ \text{Coding Rate} = \frac{\text{Total Charts}}{\text{Total Hours}} = \frac{23 \text{ charts}}{7.5 \text{ hours}} \approx 3.07 \text{ charts per hour} ]

When rounded to the nearest whole number, 3.07 becomes 3 charts per hour.

This process illustrates how to calculate the coding rate and confirms the answer, as it accurately reflects the output of the coding professional over the specified time frame. As a result, rounding 3.07 gives you a final output of 3 charts per hour, supporting the selection of that choice.