The following graph represents the relation between pressure and elevation, where the 𝑥-coordinate is the elevation in kilometers and the 𝑦-coordinate is the pressure in bars. Which quadrant would contain a point that is 11 kilometers below sea level under a pressure of six bars?
Our graph is relating pressure and elevation. The pressure will be marked as the 𝑦-coordinate. And the elevation will be marked as the 𝑥-coordinate. We know that a point is 11 kilometers below sea level and that the pressure is six bars.
Our 𝑥-axis, the blue line, is marking elevation. Positive elevation would go on the right. Negative elevation would go on the left. Everything on the right is above sea level. And everything on the left is below sea level.
On the 𝑦-axis, in yellow, positive pressure is at the top and negative pressure would be on the bottom half. We know that we are below sea level. We must be dealing with quadrant two or three. Six bars of pressure is positive. Positive pressure with negative elevation is quadrant two. A point that is 11 kilometers below sea level under a pressure of six bars would fall on our graph in quadrant two.