How would dercreasing that time it takes you to run a certain distsance affect your speed?

Decreasing the time it takes to run a certain distance directly increases your speed, as speed is defined as distance divided by time. For example, if you run a mile in 8 minutes instead of 10 minutes, your speed increases from 7.5 mph to 8.25 mph. Therefore, reducing your time for a given distance leads to a higher average speed. This improvement can result from better training, enhanced endurance, or more efficient running techniques.