WILL MARK BRAINLIEST ANSWER AND EXPLAIN--- thank you- 13 POINTS!!

A fish is swimming at a constant rate toward the ocean floor. The equation y=-7x-3 can be used to represent this situation, where y is the depth of the fish in meters below sea level and x is the number of seconds the fish has been swimming.

Which statement best describes the depth of the fish, given this equation?

A
From a starting position of 7 meters below sea level, the fish is descending 3 meters per second.

B
From a starting position of 7 meters below sea level, the fish is ascending 3 meters per second.

C
From a starting position of 3 meters below sea level, the fish is descending 7 meters per second.

D
From a starting position of 3 meters below sea level, the fish is ascending 7 meters per second.