### Home > INT2 > Chapter 9 > Lesson 9.2.2 > Problem9-68

9-68.

Eliana is training for a race in San Francisco, so she has a new running route that includes running up and down a steep hill. Data from her last training run is shown in the table at right.

1. During which $10$-minute interval did Eliana run the fastest? The slowest? Justify your answers.

During which $10$-minute intervals does Eliana run the greatest distance and the least distance?

2. What was Eliana’s average speed during the last $10$ minutes of her run? Show your work and include units.

Find the total distance traveled in the final $10$ minutes and divide that by $10$. Your answer should be in miles/minute.

 Time (min) Distance (mi) $0$ $0$ $10$ $1.1$ $20$ $1.5$ $30$ $2.5$ $40$ $3.7$ $50$ $4.8$