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
54 exam-style questions on Edexcel GCSE Physics 15.2 Pressure in fluids, covering 15.2.1 Atmospheric pressure and height, 15.2.2 Pressure in fluids, 15.2.3 Pressure, force and area, 15.2.4 Pressure and depth, 15.2.5 Pressure in liquids: depth and density, 15.2.6 Upthrust, and 15.2.7 Floating and sinking. Each one has a worked solution and a mark scheme showing where the marks go.