P4.7.4 - Position vectors

Position vectors.; OB − OA = AB = b − a.

Use position vectors to connect the rule to the data and decision in the question.

This matters because position vectors determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply position vectors to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Position vectors is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.