Math

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?
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.
Please help quickly, Thanks!

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  1. C
    think about it...

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    oobleck
  2. I still don't understand

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  3. A pilot takes a taxi from the airport to a hotel. The taxi driver charges a 2.50 initial charge plus 2.65 per mile. Which equation can be used to find y, the total cost of the trip, if x represents the number of miles of the trip?
    A. y=2.50x+2.65
    B. y=2.65 (x+2.50)
    C. y=2.65x-2.50
    D. y=2.65x + 2.50

    Please help. Need answer quick ASAP!

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