A scientist measures the total pressure at various depths below the surface of a large freshwater lake. They plot a graph of total pressure on the yyy-axis against depth on the xxx-axis.
Which of the following mathematical equations represents this relationship?
y=kxy = \frac{k}{x}y=xk
y=mxy = mxy=mx
y=mx+cy = mx + cy=mx+c
y=ax2y = ax^2y=ax2