Jennifer is calculating her gpa. if she uses "=(a1+a2+a3+a4)/4", this is an example of which type of entry?

The first thing we should know in this case is the meaning of the following acronyms:
 (GPA) = Grade Point Average.
 Effectively in a program like excel she can use:
 GPA = (a1 + a2 + a3 + a4) / 4
 Where,
 ai = represents each of the notes (i: 1,2,3,4)
 However, this is also an example of the following type of entry:
 GPA = AVERAGE (a1: a4)
 
 Entry:
 Formulas: are references of cells, names of cells or ranges, functions or operators that result in a value from other existing values.