Answer:
Domain is all positive integers.
Explanation:
It is given that Glenn-Paul is walking and his average step has length 0.7m.
Let x be the number of steps. So, the total distance (in m) covered by him is

We need to find the domain.
Domain is the set of input values or x values.
The number of sets can not be a negative or decimal value.
Therefore, the domain is all positive integers.