Final answer:
A positive grade away from the foundation of a home means moving in the direction away from the school, counting from Kosma's house as the origin.
Step-by-step explanation:
The question is asking about the distance of a positive grade away from the foundation of a home.
Based on the given information, the reference point or origin is at Kosma's house. If we choose the direction towards the school as negative, then the direction away from the school (grade) is positive.
Therefore, a positive grade away from the foundation of a home means moving in the direction away from the school, counting from Kosma's house as the origin.