Starfish have about 15,000 tiny feet that help them move around the ocean floor. The table shows the distance traveled by a starfish over a given time. Time (seconds)

180

240

360

420

Distance (meter)

3

4

6

7

Based on the information in the table, which answer choice represents the constant rate of change a starfish can travel?

A. It takes a starfish 1 second to travel 12 meters.
B. It takes a starfish 6 seconds to travel 10 meters.
C. It takes a starfish 12 seconds to travel 1 meter.
D. It takes a starfish 60 seconds to travel 1 meter.