From 2 hours to 4 hours she traveled 7 miles.
7 miles / 2 hours = 3.5 miles per hour.
The slope is 3.5 , which is 3.5 miles per hour, which is how fast she is walking.
Answer:

Step-by-step explanation:
A) 604.2
B) 609.9
C) 537.42
D) 542.49
I think the answer is 16.8