A fish is swimming at a constant rate toward the ocean floor. The equation Y equals minus X -3 can be used to represent the situation where why is the depth of the fish in meters below sea level and X is the number of seconds the fish has been swimming.

In this scenario, the equation Y = -X - 3 can be used to represent the depth of the fish in meters below sea level as a function of the number of seconds it has been swimming.

Here, Y represents the depth of the fish, and X represents the number of seconds it has been swimming. The equation is in the form of a linear equation with a slope of -1 and a y-intercept of -3.

For example, if the fish has been swimming for 5 seconds (X = 5), we can substitute this value into the equation:

Y = -(5) - 3 = -8

This means that after 5 seconds of swimming, the fish would be at a depth of -8 meters below sea level.

Similarly, if the fish has been swimming for 10 seconds (X = 10), we can substitute this value into the equation:

Y = -(10) - 3 = -13

This means that after 10 seconds of swimming, the fish would be at a depth of -13 meters below sea level.

By substituting different values for X into the equation, we can determine the depth of the fish at different points in time as it continues to swim towards the ocean floor.