Bell Ringer 7 (25-28)

The table shows the linear relationship between the distance in feet below sea level and the time in seconds traveled by a submarine.

What is the rate of change of the distance in feet below sea level with respect to time that the submarine traveled?

The conversion of degrees Celsius to degrees Fahrenheit can be represented by a linear relationship. The graph shows the linear relationship between y, the temperature in degrees Fahrenheit, and x, the temperature in degrees Celsius from the freezing point of water. 

Which equation best represents this situation?