Final answer:
The scatterplot shows the speed of the winning horses each year and can help us understand the time progression in races.
Step-by-step explanation:
The subject of this question is Statistics. The scatterplot shows the speed of the winning horses each year. By analyzing the scatterplot, we can make observations about the relationship between different factors and the speed of the horses. In this case, the scatterplot can help us understand the time progression in races and how it relates to the speed of the winning horses.
Jockey experience may also play a role in the speed of the winning horses, but this is not directly represented in the scatterplot. Similarly, horse genetics and the distribution of race tracks may have an influence on the speed of the horses, but these factors are not evident in the scatterplot alone.