To find Yolanda's reading rate in chapters per hour, you can divide the total number of chapters she read by the total time she spent reading.
Yolanda read 58 chapters in 8 hours.
The calculation is as follows:
\[ \text{Rate} = \frac{\text{Total Chapters}}{\text{Total Time}} = \frac{58 \text{ chapters}}{8 \text{ hours}} = 7.25 \text{ chapters per hour} \]
Therefore, Yolanda's reading rate is \( 7.25 \) chapters per hour.