Answer:
⇒Speed × Time =Distance
It means speed and Time is directly proportional to Distance ,while Speed and time are inversely Proportional to each Other.
Now coming to given situations
1. When a car is moving in stop-and-go traffic, at different intervals, speed of car will vary, which means unequal distance travelled in equal intervals.
2.The Second situation is
A person biking on a trail at 12 miles per hour for 20 minutes
It shows that, for 20 minutes bike is travelling at constant rate which means,distance traveled will be proportional to time.
3.A baseball hit to center field
Speed of baseball at different instants while reaching or till hitting the center field will be different.So, In this case ,distance traveled will not be proportional to time.
4.A race car slowing down after crossing the finish line
Speed is not uniform during entire interval ,so distance traveled will not be proportional to time.
Option 2, is the situation in which distance traveled will be proportional to time.
