In the previous activity, you found an equation with a negative unit rate, y = -50x – 100. This equation gave the depth of a submarine, y, given time, x. It assumes that the submarine starts at a depth of 100 feet, and then starts descending at a rate of 50 feet per minute. In this activity, you will graph the equation. Part C
The line formed by this equation lies in several quadrants on the graph. In which quadrant specifically does the equation describe the submarine’s movement? Why only this quadrant?