The appropriate domain for this situation.C. The set of all positive integers
Numbers in mathematics can be divided into several terms
Real numbers include Whole Numbers (0,1,2..),Rational Numbers(numbers that can be expressed in simple fractions), or Irrational Numbers(√3,π, etc)
Integer consist of positive, negative and 0 numbers
A role-playing game have experience points of a player for every chapter.
So the chapter must be in number 1,2,3 .. etc
Domain is the input of a function
for the function P(x), x = domain
Then the appropriate domain for this situation :
C. the set of all positive integers
It is not possible to choose points A, B, or D because they can be negative or fractional
the set of ordered pairs of functions
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Keywords : function, a role playing game, chapter, domain