## Algebra 1

In order to find average speed, we divide the total distance traveled by the amount of time it took to travel that distance. Thus, we obtain: Trisha: $10km/2.5 hours=4$ km per hour Olga: $9.5km / 2.25 hours=4.22$ km per hour Jason: $7.5km/2 hours=3.75$km per hour Thus, we find that Olga had the fastest average speed.