What indicates how quickly or slowly an increase or decrease happens?

At what point was his heart rate constant?

At what point was his heart rate increasing quickly?

At what point was his heart rate decreasing?

At what point was his heart rate increasing slowly?

The graph at the right shows Dylan's motorcycle trip from his home to his friend's home in another city.

During which time interval did Dylan stop for lunch

The graph at the right shows Dylan's motorcycle trip from his home to his friend's home in another city.

During which time interval did the distance increase the fastest

The graph at the right shows Dylan's motorcycle trip from his home to his friend's home in another city.

During which time interval did the distance increase the fastest

It takes Ariel 60 minutes to reach the hiking team's campsite, following a trail depicted in the graph at the right.

During which time interval did the elevation decrease

Which is story would be represented by the graph