i am doing an experiment on the dc characteristics of the BJT and have drawn the output characteristic curve for values of IB=20uA and IB=50uA (Refer to attachment)

In order to find the beta of the transistor, I take Ic(sat) / Ib.

Referring to the 2 points of the graph i have circled in the attached pic, which point should I take for Ic(sat)? The point where the curve starts to become horizontal

help is extremely appreciated. thanks=)

In order to find the beta of the transistor, I take Ic(sat) / Ib.

Referring to the 2 points of the graph i have circled in the attached pic, which point should I take for Ic(sat)? The point where the curve starts to become horizontal

**[black box]**or the point right at the end (highest point of Ic)**[red box]**?help is extremely appreciated. thanks=)