To answer your question accurately, I need the specific time and distance data for Larry's run. Average speed is calculated with the formula:
\[ \text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} \]
If you provide the distances Larry ran during the specified time intervals (from hour 2 to hour 4, and from hour 4 to hour 7), I can calculate his average speeds and determine whether he sped up, slowed down, or maintained the same speed.