Please help me I will give you extra points and whoever the first one to answer I mark you with the brain thing.

Answer:
C) 5
Step-by-step explanation:
At 0 hours, distance was 20 miles
At 4 hours, distance was 40 miles
Rate of change in distance to time
= (40-20) / (4-0)
= 20 / 4
= 5 miles per hour