# 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.

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1. C

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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

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