Regents Exam: Algebra I August 2016 (Problem 20 of 37)

The video tutorial discusses how to calculate the cost of downloading songs from an online company. It introduces a problem involving a $5 membership fee and a 99-cent charge per song. The tutorial defines a variable expression for the total cost and evaluates different domain options for the variable representing the number of songs. After analyzing rational numbers, whole numbers, and integers, it concludes that whole numbers greater than or equal to one are the most appropriate domain for the variable.

What new insight or understanding did you gain from this video?