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[@engineeringeconomicsguy](/creator/youtube/engineeringeconomicsguy)
"Internal Rate of Return IRR and Linear Interpolation - Engineering Economics Lightboard"  
[YouTube Link](https://youtube.com/watch?v=IP2XNmbKaFk) [@engineeringeconomicsguy](/creator/youtube/engineeringeconomicsguy) 2020-03-31T04:00Z 14.7K followers, 55.6K engagements


"Incremental IRR - Engineering Economics Lightboard"  
[YouTube Link](https://youtube.com/watch?v=g1hI58w_FtI) [@EngineeringEconomicsGuy](/creator/youtube/EngineeringEconomicsGuy) 2020-03-31T04:00Z 14.7K followers, 38.3K engagements


"Arithmetic Gradient - Engineering Economics Lightboard"  
[YouTube Link](https://youtube.com/watch?v=ykQ7M9UNuok) [@engineeringeconomicsguy](/creator/youtube/engineeringeconomicsguy) 2020-03-31T04:00Z 14.7K followers, 45.7K engagements