Jocelyn is training for a race by running several miles each day. She tracks her progress by recording her average speed in minutes per mile for each day since she started training
1
2
3
4
5
6
Number of Days, x
Average Speed (min/mile), y
8.2
8.1
7.5
7.8
7.4
7.5

Based on the information given, what could Jocelyn expect to have for her average speed on the 9th day?
O 8.5 minutes per mile
O 7.2 minutes per mile
6.9 minutes per mile
O 6.2 minutes per mile