flow curve of a 15% suspension of bentonite clay

flow curve of a 15% suspension of bentonite clay

Build a flow curve of a 15% suspension of bentonite clay according to the following experimental data:
y 1,400 1,762 2,218 2,793 3,516 5,572 7,015 11,12
P H / m2 1 1.305 1.625 2.01 2.5 3.79 4.68 6.53
Determine the Bingham PT shear strength, ultimate shear stress Pm, and plastic viscosity n.

Additional information:

Freehand decision, graphic made in exel.