[neumann]

Not necessarily, it can also describe the slope, based on the timestamp of the projects.

4 years ago I did this, I did this last year, last month I tried my hand at this. However, it requires the interviewer to have the skill to extract this information during the interview and recognise the slope.

[Retric]

Your assuming equal time and focas for all projects which does not happen.

[PakG1]

Whether the data presents an exponential curve, parabolic curve, or logarithmic curve, it doesn't change the analysis though.